indexed colour; indexed color
Computing term for a colour mode where each pixel value is an index into a colour palette, rather than a direct colour value.
GIF images use indexed colour.
This software supports palette editing for indexed colour.
フルカラー (full colour) stores actual colour values per pixel, while 指標付き色指定 uses a limited palette of colours referenced by index.
Compound of 指標 (index) + 付き (with) + 色指定 (colour specification). A technical calque from English 'indexed colour'.