Dealing with out of gamut colors (and filmic)

[s7habo (Boris Hajdukovic)]

hi @bastibe

@anon41087856 had similar problem with blue LEDs :

@anon41087856

Step 6 : channel mixer

We still need to deal with those out of gamut blues. There is a trick I took from theACES , which involves applying a custom RGB matrix to force those blues back. Unfortunately, the ACES coefficients expect an ACES P1 colour space, and darktable pipeline works in Rec 2020 by default, so the coeff will need to be adjusted.

The settings are as follow:

• red destination :
  • R = 1.00
  • G = -0.18
  • B = 0.18
• green destination :
  • R = -0.2
  • G = 1.0
  • B = 0.2
• blue destination :
  • R = 0.05
  • G = -0.05
  • B = 1.000

Maybe that can help you.