#636CF0#636CF0

#636CF0 is a mid, vivid blue. Relative luminance 0.197; OKLCH L 59.5% C 0.195 H 275.8°. Best body text is #000000 at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#636CF0
RGB	rgb(99, 108, 240)
HSL	hsl(236, 82%, 66%)
HSV	hsv(236, 59%, 94%)
CMYK	cmyk(58.8%, 55%, 0%, 5.9%)
CIE-LAB	lab(51.46, 34.76, -67.73)
CIE-LCH	lch(51.46, 76.13, 297.17°)
OKLab	oklab(59.53% 0.0197 -0.1943)
OKLCH	oklch(59.53% 0.195 275.8)
XYZ	xyz(26.2312, 19.6671, 84.8350)
Luminance	0.1967 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#636CF0 #F0E763

analogous

#63B3F0 #636CF0 #A163F0

triadic

#636CF0 #F0636C #6CF063

tetradic

#636CF0 #F063B3 #F0E763 #63F0A1

square

#636CF0 #F063B3 #F0E763 #63F0A1

split-complementary

#636CF0 #F0A163 #B3F063

monochromatic

#131EC6 #2B37EB #636CF0 #9BA1F5 #D3D5FB

Accessibility & contrast

On white

4.26

#636CF0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.93

#636CF0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #636CF0

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##636CF0	#FFFFFF	#000000	##000000
##636CF0	1.00	4.26	4.93	4.93
#FFFFFF	4.26	1.00	21.00	21.00
#000000	4.93	21.00	1.00	1.00
##000000	4.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0081F5

Deuteranopia (green-blind)

#0075ED

Tritanopia (blue-blind)

#008BA4

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #636cf0;
/* rgb */ color: rgb(99, 108, 240);
/* oklch */ color: oklch(59.5% 0.195 275.8);

Tailwind

colors: {
  custom: {
    50: '#9b96f6',
    500: '#636cf0',
    950: '#000000',
  },
}

SCSS

$custom: #636cf0;
$custom-light: #9b96f6;
$custom-dark: #000000;

JSON

{
  "hex": "#636cf0",
  "rgb": {
    "r": 99,
    "g": 108,
    "b": 240
  },
  "hsl": {
    "h": 236.17,
    "s": 82.456,
    "l": 66.471
  },
  "oklch": {
    "l": 0.59527,
    "c": 0.19532,
    "h": 275.8
  },
  "luminance": 0.19669
}

Semantic roles & 50–950 ramp

primary

#636CF0

secondary

#EEEBC1

accent

#D107DF

background

#FAF9FF

surface

#F4F1FF

border

#CECBD7

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #636CF0

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

Preview Lab → · Contrast checker → · Palette generator →