#636FCF#636FCF

#636FCF is a mid, vivid blue. Relative luminance 0.185; OKLCH L 57.9% C 0.147 H 275.5°. Best body text is #000000 at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#636FCF
RGB	rgb(99, 111, 207)
HSL	hsl(233, 53%, 60%)
HSV	hsv(233, 52%, 81%)
CMYK	cmyk(52.2%, 46.4%, 0%, 18.8%)
CIE-LAB	lab(50.13, 22.38, -51.25)
CIE-LCH	lch(50.13, 55.92, 293.59°)
OKLab	oklab(57.86% 0.014 -0.1458)
OKLCH	oklch(57.86% 0.147 275.5)
XYZ	xyz(22.0889, 18.5251, 61.4311)
Luminance	0.1853 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#636FCF #CFC363

analogous

#63A5CF #636FCF #8D63CF

triadic

#636FCF #CF636F #6FCF63

tetradic

#636FCF #CF63A5 #CFC363 #63CF8D

square

#636FCF #CF63A5 #CFC363 #63CF8D

split-complementary

#636FCF #CF8D63 #A5CF63

monochromatic

#2B368C #3A48BB #636FCF #929ADD #C1C5EC

Accessibility & contrast

On white

4.46

#636FCF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.71

#636FCF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #636FCF

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##636FCF	#FFFFFF	#000000	##000000
##636FCF	1.00	4.46	4.71	4.71
#FFFFFF	4.46	1.00	21.00	21.00
#000000	4.71	21.00	1.00	1.00
##000000	4.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#447CD3

Deuteranopia (green-blind)

#3973CD

Tritanopia (blue-blind)

#338495

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #636fcf;
/* rgb */ color: rgb(99, 111, 207);
/* oklch */ color: oklch(57.9% 0.147 275.5);

Tailwind

colors: {
  custom: {
    50: '#9698de',
    500: '#636fcf',
    950: '#000000',
  },
}

SCSS

$custom: #636fcf;
$custom-light: #9698de;
$custom-dark: #000000;

JSON

{
  "hex": "#636fcf",
  "rgb": {
    "r": 99,
    "g": 111,
    "b": 207
  },
  "hsl": {
    "h": 233.333,
    "s": 52.941,
    "l": 60
  },
  "oklch": {
    "l": 0.57858,
    "c": 0.14651,
    "h": 275.5
  },
  "luminance": 0.18527
}

Semantic roles & 50–950 ramp

primary

#636FCF

secondary

#DCD7B2

accent

#CC4BDC

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #636FCF

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

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