desc_idString identifier hashed with the current ID stack to distinguish this item or scope.
colFloating-point RGBA color; alpha controls opacity.
flagsImGuiColorEditFlags options controlling this operation; combine compatible flag bits with |.
sizeColor button width and height in pixels; each zero axis uses the standard frame height.
True when the item is activated this frame; this is an activation event, not a persistent selected state.
Display a color swatch button.