#646DBB#646DBB

#646DBB is a mid, vivid blue. Relative luminance 0.172; OKLCH L 56.3% C 0.120 H 276.8°. Best body text is #FFFFFF at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#646DBB
RGB	rgb(100, 109, 187)
HSL	hsl(234, 39%, 56%)
HSV	hsv(234, 47%, 73%)
CMYK	cmyk(46.5%, 41.7%, 0%, 26.7%)
CIE-LAB	lab(48.55, 17.61, -42.27)
CIE-LCH	lch(48.55, 45.79, 292.62°)
OKLab	oklab(56.31% 0.0143 -0.1195)
OKLCH	oklch(56.31% 0.12 276.8)
XYZ	xyz(19.6911, 17.2334, 49.2929)
Luminance	0.1723 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646DBB #BBB264

analogous

#6499BB #646DBB #8764BB

triadic

#646DBB #BB646D #6DBB64

tetradic

#646DBB #BB6499 #BBB264 #64BB87

square

#646DBB #BB6499 #BBB264 #64BB87

split-complementary

#646DBB #BB8764 #99BB64

monochromatic

#323972 #454E9D #646DBB #8F95CE #B9BDE0

Accessibility & contrast

On white

4.72

#646DBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.45

#646DBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646DBB

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646DBB	#FFFFFF	#000000	##FFFFFF
##646DBB	1.00	4.72	4.45	4.72
#FFFFFF	4.72	1.00	21.00	1.00
#000000	4.45	21.00	1.00	21.00
##FFFFFF	4.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F77BE

Deuteranopia (green-blind)

#4870B9

Tritanopia (blue-blind)

#457D8B

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #646dbb;
/* rgb */ color: rgb(100, 109, 187);
/* oklch */ color: oklch(56.3% 0.120 276.8);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#646dbb",
  "rgb": {
    "r": 100,
    "g": 109,
    "b": 187
  },
  "hsl": {
    "h": 233.793,
    "s": 39.013,
    "l": 56.275
  },
  "oklch": {
    "l": 0.56314,
    "c": 0.12037,
    "h": 276.8
  },
  "luminance": 0.17234
}

Semantic roles & 50–950 ramp

primary

#646DBB

secondary

#CFCCAB

accent

#C359CF

background

#F9F9FC

surface

#F2F2F9

border

#CCCCD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #646DBB

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

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