#646CBF#646CBF

#646CBF is a mid, vivid blue. Relative luminance 0.172; OKLCH L 56.3% C 0.128 H 277.3°. Best body text is #FFFFFF at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#646CBF
RGB	rgb(100, 108, 191)
HSL	hsl(235, 42%, 57%)
HSV	hsv(235, 48%, 75%)
CMYK	cmyk(47.6%, 43.5%, 0%, 25.1%)
CIE-LAB	lab(48.50, 19.45, -44.66)
CIE-LCH	lch(48.50, 48.71, 293.54°)
OKLab	oklab(56.35% 0.0163 -0.1265)
OKLCH	oklch(56.35% 0.128 277.3)
XYZ	xyz(20.0192, 17.1949, 51.5442)
Luminance	0.1720 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646CBF #BFB764

analogous

#649ABF #646CBF #8964BF

triadic

#646CBF #BF646C #6CBF64

tetradic

#646CBF #BF649A #BFB764 #64BF89

square

#646CBF #BF649A #BFB764 #64BF89

split-complementary

#646CBF #BF8964 #9ABF64

monochromatic

#313777 #434CA3 #646CBF #8F95D1 #BBBEE3

Accessibility & contrast

On white

4.73

#646CBF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.44

#646CBF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646CBF

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646CBF	#FFFFFF	#000000	##FFFFFF
##646CBF	1.00	4.73	4.44	4.73
#FFFFFF	4.73	1.00	21.00	1.00
#000000	4.44	21.00	1.00	21.00
##FFFFFF	4.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B77C2

Deuteranopia (green-blind)

#4470BD

Tritanopia (blue-blind)

#437D8C

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #646cbf;
/* rgb */ color: rgb(100, 108, 191);
/* oklch */ color: oklch(56.3% 0.128 277.3);

Tailwind

colors: {
  custom: {
    50: '#9596d3',
    500: '#646cbf',
    950: '#000000',
  },
}

SCSS

$custom: #646cbf;
$custom-light: #9596d3;
$custom-dark: #000000;

JSON

{
  "hex": "#646cbf",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 191
  },
  "hsl": {
    "h": 234.725,
    "s": 41.553,
    "l": 57.059
  },
  "oklch": {
    "l": 0.56348,
    "c": 0.12755,
    "h": 277.3
  },
  "luminance": 0.17196
}

Semantic roles & 50–950 ramp

primary

#646CBF

secondary

#D2CFAD

accent

#C756D1

background

#F9F9FD

surface

#F2F1FA

border

#CCCBD3

text

#0E0D14

muted

#7E7E83

Preview Lab

Preview with #646CBF

Body copy rendered with the generated semantic roles for this colour.

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