#636FC9#636FC9

#636FC9 is a mid, vivid blue. Relative luminance 0.182; OKLCH L 57.5% C 0.138 H 275.5°. Best body text is #000000 at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#636FC9
RGB	rgb(99, 111, 201)
HSL	hsl(233, 49%, 59%)
HSV	hsv(233, 51%, 79%)
CMYK	cmyk(50.7%, 44.8%, 0%, 21.2%)
CIE-LAB	lab(49.78, 20.49, -48.37)
CIE-LCH	lch(49.78, 52.53, 292.95°)
OKLab	oklab(57.48% 0.0131 -0.1374)
OKLCH	oklch(57.48% 0.138 275.5)
XYZ	xyz(21.3693, 18.2373, 57.6411)
Luminance	0.1824 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#636FC9 #C9BD63

analogous

#63A2C9 #636FC9 #8A63C9

triadic

#636FC9 #C9636F #6FC963

tetradic

#636FC9 #C963A2 #C9BD63 #63C98A

square

#636FC9 #C963A2 #C9BD63 #63C98A

split-complementary

#636FC9 #C98A63 #A2C963

monochromatic

#2E3884 #3D4BB1 #636FC9 #9099D9 #BEC3E8

Accessibility & contrast

On white

4.52

#636FC9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.65

#636FC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #636FC9

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##636FC9	#FFFFFF	#000000	##000000
##636FC9	1.00	4.52	4.65	4.65
#FFFFFF	4.52	1.00	21.00	21.00
#000000	4.65	21.00	1.00	1.00
##000000	4.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#497BCC

Deuteranopia (green-blind)

#3F72C7

Tritanopia (blue-blind)

#388292

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #636fc9;
/* rgb */ color: rgb(99, 111, 201);
/* oklch */ color: oklch(57.5% 0.138 275.5);

Tailwind

colors: {
  custom: {
    50: '#9698da',
    500: '#636fc9',
    950: '#000000',
  },
}

SCSS

$custom: #636fc9;
$custom-light: #9698da;
$custom-dark: #000000;

JSON

{
  "hex": "#636fc9",
  "rgb": {
    "r": 99,
    "g": 111,
    "b": 201
  },
  "hsl": {
    "h": 232.941,
    "s": 48.571,
    "l": 58.824
  },
  "oklch": {
    "l": 0.57484,
    "c": 0.13803,
    "h": 275.5
  },
  "luminance": 0.18239
}

Semantic roles & 50–950 ramp

primary

#636FC9

secondary

#D8D3B0

accent

#C850D8

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #636FC9

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

Preview Lab → · Contrast checker → · Palette generator →