@pbroom/color-kit/driverSlider gradient
RgbSliderModelChannel
RGB channels: r, g, b 0..255, alpha 0..1.
import type { RgbSliderModelChannel } from '@pbroom/color-kit/driver';slider-gradient.ts:44type RgbSliderModelChannel = 'r' | 'g' | 'b' | 'alpha';