Function darken

src/inject/dynamic-theme/modify-css.ts:233–233

(darker: number)

        const rgb = parseColorWithCache(theme.scrollbarColor)!;
        const hsl = rgbToHSL(rgb);
        const darken = (darker: number) => ({...hsl, l: clamp(hsl.l - darker, 0, 1)});
        colorTrack = hslToString(darken(0.4));
        colorThumb = hslToString(hsl);
    }