#636DCF#636DCF

#636DCF is a mid, vivid blue. Relative luminance 0.181; OKLCH L 57.5% C 0.149 H 276.3°. Best body text is #000000 at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#636DCF
RGB	rgb(99, 109, 207)
HSL	hsl(234, 53%, 60%)
HSV	hsv(234, 52%, 81%)
CMYK	cmyk(52.2%, 47.3%, 0%, 18.8%)
CIE-LAB	lab(49.61, 23.61, -52.08)
CIE-LCH	lch(49.61, 57.18, 294.38°)
OKLab	oklab(57.47% 0.0163 -0.1483)
OKLCH	oklch(57.47% 0.149 276.3)
XYZ	xyz(21.8732, 18.0935, 61.3592)
Luminance	0.1809 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#636DCF #CFC563

analogous

#63A3CF #636DCF #8F63CF

triadic

#636DCF #CF636D #6DCF63

tetradic

#636DCF #CF63A3 #CFC563 #63CF8F

square

#636DCF #CF63A3 #CFC563 #63CF8F

split-complementary

#636DCF #CF8F63 #A3CF63

monochromatic

#2B348C #3A46BB #636DCF #9299DD #C1C5EC

Accessibility & contrast

On white

4.55

#636DCF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.62

#636DCF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #636DCF

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##636DCF	#FFFFFF	#000000	##000000
##636DCF	1.00	4.55	4.62	4.62
#FFFFFF	4.55	1.00	21.00	21.00
#000000	4.62	21.00	1.00	1.00
##000000	4.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#417BD3

Deuteranopia (green-blind)

#3572CD

Tritanopia (blue-blind)

#338294

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #636dcf;
/* rgb */ color: rgb(99, 109, 207);
/* oklch */ color: oklch(57.5% 0.149 276.3);

Tailwind

colors: {
  custom: {
    50: '#9796de',
    500: '#636dcf',
    950: '#000000',
  },
}

SCSS

$custom: #636dcf;
$custom-light: #9796de;
$custom-dark: #000000;

JSON

{
  "hex": "#636dcf",
  "rgb": {
    "r": 99,
    "g": 109,
    "b": 207
  },
  "hsl": {
    "h": 234.444,
    "s": 52.941,
    "l": 60
  },
  "oklch": {
    "l": 0.57465,
    "c": 0.14918,
    "h": 276.3
  },
  "luminance": 0.18095
}

Semantic roles & 50–950 ramp

primary

#636DCF

secondary

#DCD8B2

accent

#CF4BDC

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #636DCF

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

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