#636DCB#636DCB

#636DCB is a mid, vivid blue. Relative luminance 0.179; OKLCH L 57.2% C 0.144 H 276.3°. Best body text is #000000 at 4.58:1 contrast (WCAG AA passes).

Color values

HEX	#636DCB
RGB	rgb(99, 109, 203)
HSL	hsl(234, 50%, 59%)
HSV	hsv(234, 51%, 80%)
CMYK	cmyk(51.2%, 46.3%, 0%, 20.4%)
CIE-LAB	lab(49.38, 22.34, -50.17)
CIE-LCH	lch(49.38, 54.92, 294.01°)
OKLab	oklab(57.21% 0.0157 -0.1427)
OKLCH	oklch(57.21% 0.144 276.3)
XYZ	xyz(21.3903, 17.9004, 58.8163)
Luminance	0.1790 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#636DCB #CBC163

analogous

#63A1CB #636DCB #8D63CB

triadic

#636DCB #CB636D #6DCB63

tetradic

#636DCB #CB63A1 #CBC163 #63CB8D

square

#636DCB #CB63A1 #CBC163 #63CB8D

split-complementary

#636DCB #CB8D63 #A1CB63

monochromatic

#2D3687 #3C48B5 #636DCB #9198DA #BFC3EA

Accessibility & contrast

On white

4.58

#636DCB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.58

#636DCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #636DCB

4.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##636DCB	#FFFFFF	#000000	##000000
##636DCB	1.00	4.58	4.58	4.58
#FFFFFF	4.58	1.00	21.00	21.00
#000000	4.58	21.00	1.00	1.00
##000000	4.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#447ACE

Deuteranopia (green-blind)

#3971C9

Tritanopia (blue-blind)

#378192

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #636dcb;
/* rgb */ color: rgb(99, 109, 203);
/* oklch */ color: oklch(57.2% 0.144 276.3);

Tailwind

colors: {
  custom: {
    50: '#9696db',
    500: '#636dcb',
    950: '#000000',
  },
}

SCSS

$custom: #636dcb;
$custom-light: #9696db;
$custom-dark: #000000;

JSON

{
  "hex": "#636dcb",
  "rgb": {
    "r": 99,
    "g": 109,
    "b": 203
  },
  "hsl": {
    "h": 234.231,
    "s": 50,
    "l": 59.216
  },
  "oklch": {
    "l": 0.57212,
    "c": 0.14355,
    "h": 276.3
  },
  "luminance": 0.17902
}

Semantic roles & 50–950 ramp

primary

#636DCB

secondary

#D9D5B1

accent

#CC4EDA

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #636DCB

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

Preview Lab → · Contrast checker → · Palette generator →