#636ECB#636ECB

#636ECB is a mid, vivid blue. Relative luminance 0.181; OKLCH L 57.4% C 0.142 H 275.9°. Best body text is #000000 at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#636ECB
RGB	rgb(99, 110, 203)
HSL	hsl(234, 50%, 59%)
HSV	hsv(234, 51%, 80%)
CMYK	cmyk(51.2%, 45.8%, 0%, 20.4%)
CIE-LAB	lab(49.64, 21.73, -49.75)
CIE-LCH	lch(49.64, 54.29, 293.59°)
OKLab	oklab(57.41% 0.0146 -0.1414)
OKLCH	oklch(57.41% 0.142 275.9)
XYZ	xyz(21.4976, 18.1150, 58.8521)
Luminance	0.1812 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#636ECB #CBC063

analogous

#63A2CB #636ECB #8C63CB

triadic

#636ECB #CB636E #6ECB63

tetradic

#636ECB #CB63A2 #CBC063 #63CB8C

square

#636ECB #CB63A2 #CBC063 #63CB8C

split-complementary

#636ECB #CB8C63 #A2CB63

monochromatic

#2D3687 #3C49B5 #636ECB #9199DA #BFC3EA

Accessibility & contrast

On white

4.54

#636ECB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.62

#636ECB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #636ECB

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##636ECB	#FFFFFF	#000000	##000000
##636ECB	1.00	4.54	4.62	4.62
#FFFFFF	4.54	1.00	21.00	21.00
#000000	4.62	21.00	1.00	1.00
##000000	4.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#467ACE

Deuteranopia (green-blind)

#3B72C9

Tritanopia (blue-blind)

#378293

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #636ecb;
/* rgb */ color: rgb(99, 110, 203);
/* oklch */ color: oklch(57.4% 0.142 275.9);

Tailwind

colors: {
  custom: {
    50: '#9697db',
    500: '#636ecb',
    950: '#000000',
  },
}

SCSS

$custom: #636ecb;
$custom-light: #9697db;
$custom-dark: #000000;

JSON

{
  "hex": "#636ecb",
  "rgb": {
    "r": 99,
    "g": 110,
    "b": 203
  },
  "hsl": {
    "h": 233.654,
    "s": 50,
    "l": 59.216
  },
  "oklch": {
    "l": 0.57409,
    "c": 0.1422,
    "h": 275.9
  },
  "luminance": 0.18116
}

Semantic roles & 50–950 ramp

primary

#636ECB

secondary

#D9D5B1

accent

#CB4EDA

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #636ECB

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

Preview Lab → · Contrast checker → · Palette generator →