#636BDB#636BDB

#636BDB is a mid, vivid blue. Relative luminance 0.183; OKLCH L 57.9% C 0.168 H 276.7°. Best body text is #000000 at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#636BDB
RGB	rgb(99, 107, 219)
HSL	hsl(236, 63%, 62%)
HSV	hsv(236, 55%, 86%)
CMYK	cmyk(54.8%, 51.1%, 0%, 14.1%)
CIE-LAB	lab(49.84, 28.64, -58.54)
CIE-LCH	lch(49.84, 65.17, 296.07°)
OKLab	oklab(57.87% 0.0196 -0.1673)
OKLCH	oklch(57.87% 0.168 276.7)
XYZ	xyz(23.1854, 18.2809, 69.3109)
Luminance	0.1828 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#636BDB #DBD363

analogous

#63A7DB #636BDB #9763DB

triadic

#636BDB #DB636B #6BDB63

tetradic

#636BDB #DB63A7 #DBD363 #63DB97

square

#636BDB #DB63A7 #DBD363 #63DB97

split-complementary

#636BDB #DB9763 #A7DB63

monochromatic

#252D9F #313CD0 #636BDB #959AE6 #C6C9F2

Accessibility & contrast

On white

4.51

#636BDB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.66

#636BDB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #636BDB

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##636BDB	#FFFFFF	#000000	##000000
##636BDB	1.00	4.51	4.66	4.66
#FFFFFF	4.51	1.00	21.00	21.00
#000000	4.66	21.00	1.00	1.00
##000000	4.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F7CDF

Deuteranopia (green-blind)

#1B72D9

Tritanopia (blue-blind)

#258499

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #636bdb;
/* rgb */ color: rgb(99, 107, 219);
/* oklch */ color: oklch(57.9% 0.168 276.7);

Tailwind

colors: {
  custom: {
    50: '#9895e7',
    500: '#636bdb',
    950: '#000000',
  },
}

SCSS

$custom: #636bdb;
$custom-light: #9895e7;
$custom-dark: #000000;

JSON

{
  "hex": "#636bdb",
  "rgb": {
    "r": 99,
    "g": 107,
    "b": 219
  },
  "hsl": {
    "h": 236,
    "s": 62.5,
    "l": 62.353
  },
  "oklch": {
    "l": 0.57872,
    "c": 0.16844,
    "h": 276.7
  },
  "luminance": 0.18283
}

Semantic roles & 50–950 ramp

primary

#636BDB

secondary

#E3E0B7

accent

#BF1BCA

background

#F9F9FE

surface

#F2F1FC

border

#CCCBD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #636BDB

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

Preview Lab → · Contrast checker → · Palette generator →