Digital colour matching can reduce the number of paint formulas and spray-outs a refinisher must evaluate, but it should not automatically replace a physical spray-out for a critical repair.
A spectrophotometer measures the existing finish. Software compares that measurement with stored formulas. Newer visualisation tools help the painter examine colour, texture and effect differences on screen. A spray-out then tests something the digital process cannot fully predict: how the selected paint actually looks when applied using the workshop’s equipment, technique, undercoat and clearcoat.
The distinction has become especially relevant following the introduction of LightAssist on 10 September 2026. Added to Surventis’s Refinity ImagePLUS system, the feature is designed to make subtle differences between match candidates more visible, particularly on black and dark-effect finishes. It was presented during Automechanika Frankfurt, held from 8–12 September 2026. Glasurit: Refinity LightAssist.
The development demonstrates how quickly digital colour identification is advancing. It does not mean that application skill, physical testing or painter judgement has become redundant.
What does digital automotive colour matching do?
A modern digital colour process normally combines three elements.
1. Measurement
A spectrophotometer directs controlled light at the vehicle finish and records the reflected response.
Multi-angle devices can gather information about how the colour changes when viewed from different positions. This is particularly useful for metallics, pearls and other effect finishes, where face colour, flop and sparkle cannot be represented adequately by one measurement angle.
2. Formula retrieval
The measurement is compared with a database of manufacturer colours, production variants and adjusted formulas. Software then ranks possible matches or proposes a formula associated with the measured finish.
This can be far more useful than relying on the vehicle’s paint code alone. One code may have several variants caused by factory, model-year, supplier or production differences.
3. Visual comparison
Digital rendering can help the technician compare candidate colours before mixing paint. Depending on the system, the display may highlight differences in hue, lightness, texture, effect-particle size or viewing-angle behaviour.
The recently announced LightAssist feature adds a visualisation mode intended to make those differences easier to identify within Refinity ImagePLUS. Surventis presents it as an aid to painter decisions rather than a replacement for coating knowledge. R-M UK announcement, 10 September 2026.
Why the paint code is only a starting point
A vehicle identification or paint code identifies the intended colour family, but not necessarily the exact appearance of the panel being repaired today.
The actual finish may have changed through:
- Factory colour variants
- Previous refinishing
- Different application conditions
- UV exposure and ageing
- Polishing or abrasion
- Clearcoat yellowing or texture
- Repairs to adjacent panels
- Environmental contamination
- Film-build differences
A formula retrieved from the correct code can therefore remain visibly different from the motorbike tank or vehicle panel.
Before measuring, clean the comparison area properly. Select a sound area close to the repair and avoid scratches, chips, dirt, severe curvature and isolated areas of previous paintwork where possible.
Standox’s published digital workflow, for example, tells users to identify the colour code, clean and degrease a suitable measurement area, calibrate the instrument when required and then search for the closest formula. Those steps are specific to its equipment but illustrate the importance of preparing the measurement itself. Standox Genius iQ workflow.
What a digital match cannot completely predict
The selected formula is only one input into the final appearance.
Colour can still be altered by:
- Primer or groundcoat shade
- Mixed quantity and weighing accuracy
- Tinter agitation
- Aerosol or spray-gun atomisation
- Spray distance
- Application pressure
- Pass overlap
- Coat wetness
- Flash time
- Number of coats
- Orientation or control-coat technique
- Panel angle
- Workshop temperature
- Clearcoat type, gloss and texture
A metallic formula sprayed heavily can appear different from the same formula applied with a lighter final control coat. A translucent colour can become darker as additional coats are applied. A motorbike tank can show several viewing angles across one curved surface.
Digital selection reduces uncertainty about the formula. It does not remove variation from the application process.
Why dark colours remain difficult
Black paint is often treated as simple, yet dark finishes can be surprisingly sensitive to small differences.
An apparently black vehicle may contain:
- Blue, brown, red or green undertones
- Fine aluminium
- Coloured sparkle
- Pearl effects
- Tinted clear layers
- Different levels of coarseness
- Matt, satin or gloss texture
Two blacks may look similar when viewed straight on but separate noticeably under sunlight or at an oblique angle.
Surventis specifically identifies black and other dark-effect colours as an area where its new LightAssist visualisation can help users identify subtle differences in colour, texture and effect. This is a manufacturer claim and should be assessed through representative workshop trials before any productivity or material-saving promise is adopted.
Why a spray-out card still matters
A spray-out card validates the complete colour process rather than the database result alone.
It can confirm:
- Correct formula selection
- Undercoat shade
- Actual application colour
- Metallic or pearl orientation
- Number of coats
- Coverage
- Clearcoated appearance
- Blendability with the vehicle
- Differences between aerosol and spray-gun application
PPG’s published spray-out procedure recommends using the same equipment and technique intended for the repair, recording the number of coats and applying clearcoat before final evaluation. It also advises inspecting effect colours at face, flash and flop angles. PPG: Creating a spray-out card.
The card should represent the repair. A sample produced with a spray gun does not necessarily validate paint that will be applied through an aerosol, because the two formats may deliver different droplet sizes, patterns and material volumes.
A practical digital-to-spray-out workflow
1. Inspect the complete repair
Determine the substrate, damage, existing coating condition and area available for blending.
2. Find the colour information
Record the manufacturer, model, year and paint code. Check whether adjacent panels have been refinished.
3. Clean the measurement area
Remove appropriate contamination and polish only where the paint system’s procedure calls for it. The instrument should read the finish, not road film or surface oxidation.
4. Calibrate the device
Use the instrument’s approved calibration procedure and confirm that its measurement head and reference tiles are clean.
5. Take representative readings
Measure a suitable area close to the repair. Where the system permits, compare several sound locations to identify variation across the vehicle.
6. Review the candidate formulas
Consider numerical ranking, digital rendering, texture, effect and known colour variants. Do not automatically accept the first result without reviewing the underlying panel.
7. Prepare the actual application format
Mix or fill the coating accurately. If the repair will use a professionally filled aerosol, create the test with that aerosol rather than an unrelated spray-gun sample.
8. Produce a representative spray-out
Use the specified undercoat, coat count, spray distance, overlap and orientation technique.
9. Apply the intended clearcoat
An uncleared sample may not show the final depth, gloss or effect. Allow the card to reach the condition required for assessment.
10. Compare and record
Examine the card in suitable artificial lighting and daylight where possible. Record the accepted formula, variant, undercoat, coat count, application equipment and clearcoat.
This creates a repeatable repair record rather than a colour decision that exists only in one technician’s memory.
Digital matching and professional aerosol systems
Digital colour matching becomes particularly interesting when it connects with near-point-of-use aerosol filling.
A workshop or motorbike paint specialist could potentially move through a linked process:
Measure the vehicle → select the formula → mix accurately → fill the application package → produce a spray-out → refine if necessary → complete the repair
The benefit is not merely access to more colours. It is the ability to adjust the supplied coating to the actual vehicle while retaining a controlled application format for a suitably sized repair.
For the process to work reliably, the aerosol system must still define:
- Compatible binder and tinters
- Permitted formula quantities
- Mixing accuracy
- Filling procedure
- Propellant and pressure conditions
- Spray pattern
- Suitable primer and clearcoat
- Traceability and labelling
- Technical and safety information
A digital formula should not be transferred automatically into an aerosol unless the coating and package have been validated for that use.
Does digital matching reduce material waste?
It can reduce unnecessary trial mixes and help reject unsuitable formula candidates before paint is prepared.
Surventis says its visualised colour-retrieval process can reduce spray-outs, material consumption and process time. Other digital-system manufacturers make similar claims about faster formula selection and reduced rework.
The actual saving in a UK bodyshop depends on:
- Existing mismatch and rework rates
- Number of variants normally mixed
- Cost of coatings and spray-out materials
- Technician training
- Instrument maintenance and calibration
- Database coverage
- Accuracy of weighing or filling
- Whether the software integrates with the workshop process
The workshop should measure its baseline before purchase and review the proportion of matches accepted without adjustment. Avoid converting a manufacturer’s general efficiency claim into a guaranteed percentage saving.
Colour accuracy is not a 1K-versus-2K question
A correct colour match may use a 1K basecoat beneath a compatible 2K clearcoat. Another system might use activated colour or a different curing architecture.
The terms 1K and 2K describe how the coating forms its film; they do not establish whether its colour is correct.
Colour selection should be validated before clearcoat application. Chemical resistance, gloss, cure and durability must then be confirmed from the complete coating system.
Where an activated automotive coating contains isocyanates, the required spraying controls remain applicable. Digital colour technology and aerosol filling do not reduce the formulation’s health hazards. HSE motor-vehicle repair COSHH guidance.
Digital tools should strengthen painter judgement
The best digital colour workflow removes avoidable searching and unnecessary mixing while preserving the final technical decision.
A screen can help reveal that two formulas differ. The painter still needs to decide whether the measurement area is representative, whether the formula suits the intended application and whether the sprayed result will blend into the vehicle.
Digital colour matching should therefore be viewed as decision support—not an automatic guarantee. The strongest process combines objective measurement, current formula data, accurate mixing or filling, a representative spray-out and informed visual evaluation.
Frequently asked questions
Can a spectrophotometer identify any automotive paint colour?
It can measure a suitable surface and search the formulas supported by its connected system. Database coverage, surface condition, curvature, effect pigments and previous repairs can affect the result.
Does digital colour matching eliminate spray-out cards?
Not necessarily. It may reduce the number required, but a spray-out remains valuable when confirming the actual undercoat, application technique, effect orientation and clearcoated result.
Can a spectrophotometer be used on a motorbike tank?
Potentially, if the device can sit correctly on a sufficiently broad, clean and undamaged area. Strong curvature may restrict measurement, so follow the instrument manufacturer’s procedure.
Why must the spray-out use the same aerosol as the repair?
Different applicators can change atomisation, film build and effect-particle orientation. Testing the actual aerosol provides more representative evidence.
Can digital matching reproduce motorbike custom paint?
Only when the system contains the required formula or the finish can be measured and reformulated appropriately. Layered candy, graphics and special effects may also require physical samples and detailed application records.
Is digital colour matching worth it for a small bodyshop?
It depends on repair volume, colour-matching time, paint waste, rework and access to supported formulas. Evaluate the complete ownership cost and trial the workflow on representative jobs.