To make sharp (in various transferred senses of the adjective). To brighten (a colour). Obsolete.

To adorn or embellish with gold or bright colour; to depict in (gold, etc.). Also (rare), to lay on (colour). Obsolete.

To increase the degree, intensity, or force of (a thing). transitive. To brighten or lighten (a colour), esp. in dyeing. Also: to heighten the colour…

To illuminate intermittently; transferred, to make resplendent with bright colours. Obsolete or archaic.