#636BF0#636BF0

#636BF0 is a mid, vivid blue. Relative luminance 0.195; OKLCH L 59.3% C 0.197 H 276.0°. Best body text is #000000 at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#636BF0
RGB	rgb(99, 107, 240)
HSL	hsl(237, 82%, 66%)
HSV	hsv(237, 59%, 94%)
CMYK	cmyk(58.8%, 55.4%, 0%, 5.9%)
CIE-LAB	lab(51.22, 35.37, -68.12)
CIE-LCH	lch(51.22, 76.75, 297.44°)
OKLab	oklab(59.35% 0.0206 -0.1955)
OKLCH	oklch(59.35% 0.197 276)
XYZ	xyz(26.1264, 19.4573, 84.8001)
Luminance	0.1946 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#636BF0 #F0E863

analogous

#63B2F0 #636BF0 #A263F0

triadic

#636BF0 #F0636B #6BF063

tetradic

#636BF0 #F063B2 #F0E863 #63F0A2

square

#636BF0 #F063B2 #F0E863 #63F0A2

split-complementary

#636BF0 #F0A263 #B2F063

monochromatic

#131DC6 #2B36EB #636BF0 #9BA0F5 #D3D5FB

Accessibility & contrast

On white

4.29

#636BF0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.89

#636BF0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #636BF0

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##636BF0	#FFFFFF	#000000	##000000
##636BF0	1.00	4.29	4.89	4.89
#FFFFFF	4.29	1.00	21.00	21.00
#000000	4.89	21.00	1.00	1.00
##000000	4.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0080F5

Deuteranopia (green-blind)

#0074ED

Tritanopia (blue-blind)

#008AA3

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #636bf0;
/* rgb */ color: rgb(99, 107, 240);
/* oklch */ color: oklch(59.3% 0.197 276.0);

Tailwind

colors: {
  custom: {
    50: '#9b95f6',
    500: '#636bf0',
    950: '#000000',
  },
}

SCSS

$custom: #636bf0;
$custom-light: #9b95f6;
$custom-dark: #000000;

JSON

{
  "hex": "#636bf0",
  "rgb": {
    "r": 99,
    "g": 107,
    "b": 240
  },
  "hsl": {
    "h": 236.596,
    "s": 82.456,
    "l": 66.471
  },
  "oklch": {
    "l": 0.59347,
    "c": 0.19657,
    "h": 276
  },
  "luminance": 0.19459
}

Semantic roles & 50–950 ramp

primary

#636BF0

secondary

#EEECC1

accent

#D307DF

background

#FAF9FF

surface

#F4F1FF

border

#CECBD7

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #636BF0

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

Preview Lab → · Contrast checker → · Palette generator →