#636FD3#636FD3

#636FD3 is a mid, vivid blue. Relative luminance 0.187; OKLCH L 58.1% C 0.152 H 275.5°. Best body text is #000000 at 4.75:1 contrast (WCAG AA passes).

Color values

HEX	#636FD3
RGB	rgb(99, 111, 211)
HSL	hsl(234, 56%, 61%)
HSV	hsv(234, 53%, 83%)
CMYK	cmyk(53.1%, 47.4%, 0%, 17.3%)
CIE-LAB	lab(50.36, 23.65, -53.15)
CIE-LCH	lch(50.36, 58.17, 293.98°)
OKLab	oklab(58.11% 0.0145 -0.1514)
OKLCH	oklch(58.11% 0.152 275.5)
XYZ	xyz(22.5842, 18.7232, 64.0393)
Luminance	0.1872 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#636FD3 #D3C763

analogous

#63A7D3 #636FD3 #8F63D3

triadic

#636FD3 #D3636F #6FD363

tetradic

#636FD3 #D363A7 #D3C763 #63D38F

square

#636FD3 #D363A7 #D3C763 #63D38F

split-complementary

#636FD3 #D38F63 #A7D363

monochromatic

#293592 #3746C2 #636FD3 #939BE0 #C2C7EE

Accessibility & contrast

On white

4.43

#636FD3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.75

#636FD3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #636FD3

4.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##636FD3	#FFFFFF	#000000	##000000
##636FD3	1.00	4.43	4.75	4.75
#FFFFFF	4.43	1.00	21.00	21.00
#000000	4.75	21.00	1.00	1.00
##000000	4.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#417DD7

Deuteranopia (green-blind)

#3473D1

Tritanopia (blue-blind)

#2F8597

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #636fd3;
/* rgb */ color: rgb(99, 111, 211);
/* oklch */ color: oklch(58.1% 0.152 275.5);

Tailwind

colors: {
  custom: {
    50: '#9798e1',
    500: '#636fd3',
    950: '#000000',
  },
}

SCSS

$custom: #636fd3;
$custom-light: #9798e1;
$custom-dark: #000000;

JSON

{
  "hex": "#636fd3",
  "rgb": {
    "r": 99,
    "g": 111,
    "b": 211
  },
  "hsl": {
    "h": 233.571,
    "s": 56,
    "l": 60.784
  },
  "oklch": {
    "l": 0.58112,
    "c": 0.15211,
    "h": 275.5
  },
  "luminance": 0.18725
}

Semantic roles & 50–950 ramp

primary

#636FD3

secondary

#DEDAB4

accent

#B222C4

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #636FD3

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

Preview Lab → · Contrast checker → · Palette generator →