#636FDB#636FDB

#636FDB is a mid, vivid blue. Relative luminance 0.191; OKLCH L 58.6% C 0.163 H 275.4°. Best body text is #000000 at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#636FDB
RGB	rgb(99, 111, 219)
HSL	hsl(234, 63%, 62%)
HSV	hsv(234, 55%, 86%)
CMYK	cmyk(54.8%, 49.3%, 0%, 14.1%)
CIE-LAB	lab(50.84, 26.20, -56.91)
CIE-LCH	lch(50.84, 62.65, 294.72°)
OKLab	oklab(58.63% 0.0154 -0.1625)
OKLCH	oklch(58.63% 0.163 275.4)
XYZ	xyz(23.6121, 19.1344, 69.4532)
Luminance	0.1914 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#636FDB #DBCF63

analogous

#63ABDB #636FDB #9363DB

triadic

#636FDB #DB636F #6FDB63

tetradic

#636FDB #DB63AB #DBCF63 #63DB93

square

#636FDB #DB63AB #DBCF63 #63DB93

split-complementary

#636FDB #DB9363 #ABDB63

monochromatic

#25319F #3141D0 #636FDB #959DE6 #C6CBF2

Accessibility & contrast

On white

4.35

#636FDB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.83

#636FDB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #636FDB

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##636FDB	#FFFFFF	#000000	##000000
##636FDB	1.00	4.35	4.83	4.83
#FFFFFF	4.35	1.00	21.00	21.00
#000000	4.83	21.00	1.00	1.00
##000000	4.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#397EDF

Deuteranopia (green-blind)

#2874D9

Tritanopia (blue-blind)

#24879B

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #636fdb;
/* rgb */ color: rgb(99, 111, 219);
/* oklch */ color: oklch(58.6% 0.163 275.4);

Tailwind

colors: {
  custom: {
    50: '#9898e7',
    500: '#636fdb',
    950: '#000000',
  },
}

SCSS

$custom: #636fdb;
$custom-light: #9898e7;
$custom-dark: #000000;

JSON

{
  "hex": "#636fdb",
  "rgb": {
    "r": 99,
    "g": 111,
    "b": 219
  },
  "hsl": {
    "h": 234,
    "s": 62.5,
    "l": 62.353
  },
  "oklch": {
    "l": 0.58632,
    "c": 0.16321,
    "h": 275.4
  },
  "luminance": 0.19136
}

Semantic roles & 50–950 ramp

primary

#636FDB

secondary

#E3DEB7

accent

#B91BCA

background

#F9F9FE

surface

#F2F2FC

border

#CCCCD5

text

#0E0D16

muted

#7E7E84

Preview Lab

Preview with #636FDB

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

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