#636BC7#636BC7

#636BC7 is a mid, vivid blue. Relative luminance 0.173; OKLCH L 56.6% C 0.141 H 277.2°. Best body text is #FFFFFF at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#636BC7
RGB	rgb(99, 107, 199)
HSL	hsl(235, 47%, 58%)
HSV	hsv(235, 50%, 78%)
CMYK	cmyk(50.3%, 46.2%, 0%, 22%)
CIE-LAB	lab(48.62, 22.32, -49.08)
CIE-LCH	lch(48.62, 53.91, 294.45°)
OKLab	oklab(56.57% 0.0175 -0.1395)
OKLCH	oklch(56.57% 0.141 277.2)
XYZ	xyz(20.7089, 17.2903, 56.2679)
Luminance	0.1729 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#636BC7 #C7BF63

analogous

#639DC7 #636BC7 #8D63C7

triadic

#636BC7 #C7636B #6BC763

tetradic

#636BC7 #C7639D #C7BF63 #63C78D

square

#636BC7 #C7639D #C7BF63 #63C78D

split-complementary

#636BC7 #C78D63 #9DC763

monochromatic

#2E3581 #3F47AE #636BC7 #9096D7 #BDC0E7

Accessibility & contrast

On white

4.71

#636BC7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.46

#636BC7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #636BC7

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##636BC7	#FFFFFF	#000000	##FFFFFF
##636BC7	1.00	4.71	4.46	4.71
#FFFFFF	4.71	1.00	21.00	1.00
#000000	4.46	21.00	1.00	21.00
##FFFFFF	4.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4378CA

Deuteranopia (green-blind)

#3A70C5

Tritanopia (blue-blind)

#3B7F8F

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #636bc7;
/* rgb */ color: rgb(99, 107, 199);
/* oklch */ color: oklch(56.6% 0.141 277.2);

Tailwind

colors: {
  custom: {
    50: '#9695d8',
    500: '#636bc7',
    950: '#000000',
  },
}

SCSS

$custom: #636bc7;
$custom-light: #9695d8;
$custom-dark: #000000;

JSON

{
  "hex": "#636bc7",
  "rgb": {
    "r": 99,
    "g": 107,
    "b": 199
  },
  "hsl": {
    "h": 235.2,
    "s": 47.17,
    "l": 58.431
  },
  "oklch": {
    "l": 0.56566,
    "c": 0.14059,
    "h": 277.2
  },
  "luminance": 0.17292
}

Semantic roles & 50–950 ramp

primary

#636BC7

secondary

#D7D4AF

accent

#CC51D7

background

#F9F9FD

surface

#F2F1FA

border

#CCCBD3

text

#0E0D14

muted

#7E7E83

Preview Lab

Preview with #636BC7

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

Preview Lab → · Contrast checker → · Palette generator →