Color mode (the bit widths of the R, G and B components of a pixel).
The native format is 6-bit for each component. When another (smaller) mode is used, the LCD will internally translate each component into the 6-bit format with a lookup table. See Sec 9.18 “Color Depth Conversion Look Up Tables” of the ST7735S datasheet for the lookup table (LUT).
Each component has 4 bits. LUT will be used.
Red has 5 bits; green has 6 bits; blue has 5 bits. LUT will be used.
Each compoment has 6 bits. This is the native format; LUT will not be used.
No idea when this value can be used.
type Error = Infallible
The type returned in the event of a conversion error.