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Pigment Color Matching
5th June 2017 TFarrugia

Pigment Color Matching

Posted in Epoxy, Gelcoat, Pigment, Polyester, Super Epoxy

Warning: Color matching is extremely difficult and requires a good eye for color and a certain amount of knowledge and thought – READ THIS AND YOU SHOULD MORE BE AQUIPT.


Post Office Red Colourmatch 20gA Short Story…

David Benoy, the creator of Blue Gee and the author of our Blue Gee Book – Glassfibre and Epoxy Book – learnt a valuable lesson when matching a grey gelcoat. A number of greys were mixed to provide a very close match, however, not close enough. After a long hard stare at the color to be matched, it was sensed rather than seen that there was a red in it… A red? Believe it. A wiped match head of red pigment was stirred into about ¼ liter of a nearly perfect match grey gelcoat. When looking at the gelcoat it was almost impossible to see any difference but once applied to the job, wow, it was a match.


Moral of The Story?

Very small apparent changes may be necessary to achieve the best color match. A grey or cream may contain a red, blue or green. It is unlikely to be a pure mix of “black and white”


We have created a little table to provide some indication of color mixing effects.

Main Colours at 3 PartsBlue Gee’s Colour mixing guide – More info in our Book.
Add these colours at 1 part
Single Red 3756Tangerine 3957Golden Yellow    3754Grass Green 11038Anchusa Blue        5978Violet   14319
Single Red 3756RedBright RedLight Bright RedReddish BrownDark PurpleBlood Red
Tangerine 3957Deep OrangeOrangeBright OrangeFrench MustardOlive GreenDeep Orange Buff
Golden Yellow    3754Dark Reddish OrangeMedium Dark YellowYellowLime GreenMedium GreenEnglish Mustard
Grass Green 11038Medium Chocolate BrownLight Olive GreenMedium GreenGreenDark GreenGrass Green
Anchusa Blue      5978Medium Dark BlueDark Grass GreenMedium Dark GreenTurquoiseBlueBright Blue
Violet   14319MaroonMedium Reddish BrownMilk ChocolateDark PurpleBlue VioletViolet

All Colors Stocked by Blue Gee – Click here for more Information


When Mixing any pigment to the clear gelcoat, always remember to

  1. decant the gelcoat, then;Golden Yellow Colourmatch 20g
  2. mix the pigment into the gelcoat.


Mixing gelcoat into a container pre-loaded with pigment will make mixing difficult due to the pigment tendency to adhere to the container wall. Always mix pigment and gelcoat before adding catalyst MEKP to the gelcoat.


Pigment may be used with polyester lay-up resin, although it is not recommended. If lay-up resin is pigmented and used for laminating it is very difficult to check that all air is excluded when consolidating.


Epoxy resin systems may be pigmented. Although our basic range – click here for Color Chart – of pigments are designed for use with polyester gelcoat systems. However, it is known that the polyester pigments may be suitable for coloring epoxy systems – subject to test, of course.


We have tested many pigments in Blue Gee’s Super Epoxy and found them satisfactory.


Note: Pigments are cosmetic and provide some protections against ultra violet (UV) light. Any pigment will inevitably slightly degrade the structural properties of any resin system.


Final note…

Generally, add pigments in at 5% no more than 10%. Densities of pigments vary widely and are available as pastes, powders and liquids.