Assertion: palette's color | /r/ObjectUse | used for the background color
Facets:
Source sentences:
text: While the same 4-bit nybble value used for the foreground color would normally allow all 16 colors to be used for the background color, the most significant bit of the background nybble is alternatively used to denote whether or not the character should blink (a hardware effect offered by CGA independent of the CPU).