Opacity, Colors and Color Depth

Color Depth

Color depths for the document are stored as a string. OCA uses the same values as Krita. This table shows the possible values:

OCA Identifier Description
U8 unsigned 8-bit integer, the most common type
U16 unsigned 16-bit integer
F16 half, 16-bit floating point
F32 32-bit floating point


All colors are stored as an [R,G,B,A] float array. Channel values are in the range [0.0 - 1.0] except Red, Green and Blue channels for F16 and F32 depths only where they can be higher than 1.0.


Opacities (and Alpha channels) are stored as a float value, in the range [0.0 - 1.0].