Accessibility
Vs white / black
5.29:1 · 3.97:1
Sources
Codes
HEX
#646d71
RGB
rgb(100, 109, 113)
RGBA
rgba(100, 109, 113, 1)
HSL
hsl(198, 6%, 42%)
HSV
hsv(198, 12%, 44%)
LAB
lab(45.41% -2.52 -3.4)
LCH
lch(45.41% 4.23 233.46)
OKLAB
oklab(0.5284 -0.0088 -0.0091)
OKLCH
oklch(0.5284 0.0127 225.96)
XYZ
xyz(13.70, 14.84, 17.76)
CMYK
cmyk(12%, 4%, 0%, 56%)
CSS
color: #646d71;
CSS variable
--color-646d71: #646d71;
SCSS
$color-646d71: #646d71;
Tailwind
slate-500
Export
:root {
--#646d71-1: #646d71;
}Palette
Full scale from light tints through the base color into deep shades
Palette
Mixed toward white — soft backgrounds and highlights
Palette
Mixed toward black — depth, text, and emphasis
Palette
Mixed toward neutral grey — muted UI surfaces
Harmony
Opposite on the color wheel for contrast
Harmony
Neighbors that sit comfortably together
Harmony
Evenly spaced triad for vibrant sets
Harmony
Base plus two accents beside the complement
Harmony
Same hue, varied lightness and saturation
Meaning
Calm professionalism with cool neutrality. Excellent for dashboards and docs.
Common uses: primary buttons, chart series, status badges, marketing gradients, and brand accents in the Blue Grey family.
Related
Nearby colors from the library by perceptual distance