#646CBB#646CBB

#646CBB is a mid, vivid blue. Relative luminance 0.170; OKLCH L 56.1% C 0.122 H 277.3°. Best body text is #FFFFFF at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#646CBB
RGB	rgb(100, 108, 187)
HSL	hsl(234, 39%, 56%)
HSV	hsv(234, 47%, 73%)
CMYK	cmyk(46.5%, 42.2%, 0%, 26.7%)
CIE-LAB	lab(48.29, 18.23, -42.69)
CIE-LCH	lch(48.29, 46.42, 293.12°)
OKLab	oklab(56.11% 0.0156 -0.1208)
OKLCH	oklch(56.11% 0.122 277.3)
XYZ	xyz(19.5850, 17.0213, 49.2575)
Luminance	0.1702 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646CBB #BBB364

analogous

#6498BB #646CBB #8864BB

triadic

#646CBB #BB646C #6CBB64

tetradic

#646CBB #BB6498 #BBB364 #64BB88

square

#646CBB #BB6498 #BBB364 #64BB88

split-complementary

#646CBB #BB8864 #98BB64

monochromatic

#323872 #454D9D #646CBB #8F94CE #B9BDE0

Accessibility & contrast

On white

4.77

#646CBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#646CBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646CBB

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646CBB	#FFFFFF	#000000	##FFFFFF
##646CBB	1.00	4.77	4.40	4.77
#FFFFFF	4.77	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E76BE

Deuteranopia (green-blind)

#476FB9

Tritanopia (blue-blind)

#457C8A

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #646cbb;
/* rgb */ color: rgb(100, 108, 187);
/* oklch */ color: oklch(56.1% 0.122 277.3);

Tailwind

colors: {
  custom: {
    50: '#9596d0',
    500: '#646cbb',
    950: '#000000',
  },
}

SCSS

$custom: #646cbb;
$custom-light: #9596d0;
$custom-dark: #000000;

JSON

{
  "hex": "#646cbb",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 187
  },
  "hsl": {
    "h": 234.483,
    "s": 39.013,
    "l": 56.275
  },
  "oklch": {
    "l": 0.5611,
    "c": 0.12176,
    "h": 277.3
  },
  "luminance": 0.17022
}

Semantic roles & 50–950 ramp

primary

#646CBB

secondary

#CFCCAB

accent

#C459CF

background

#F9F9FC

surface

#F2F1F9

border

#CCCBD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #646CBB

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

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