#636ECF#636ECF

#636ECF is a mid, vivid blue. Relative luminance 0.183; OKLCH L 57.7% C 0.148 H 275.9°. Best body text is #000000 at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#636ECF
RGB	rgb(99, 110, 207)
HSL	hsl(234, 53%, 60%)
HSV	hsv(234, 52%, 81%)
CMYK	cmyk(52.2%, 46.9%, 0%, 18.8%)
CIE-LAB	lab(49.87, 22.99, -51.66)
CIE-LCH	lch(49.87, 56.55, 293.99°)
OKLab	oklab(57.66% 0.0151 -0.1471)
OKLCH	oklch(57.66% 0.148 275.9)
XYZ	xyz(21.9804, 18.3081, 61.3950)
Luminance	0.1831 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#636ECF #CFC463

analogous

#63A4CF #636ECF #8E63CF

triadic

#636ECF #CF636E #6ECF63

tetradic

#636ECF #CF63A4 #CFC463 #63CF8E

square

#636ECF #CF63A4 #CFC463 #63CF8E

split-complementary

#636ECF #CF8E63 #A4CF63

monochromatic

#2B358C #3A47BB #636ECF #9299DD #C1C5EC

Accessibility & contrast

On white

4.50

#636ECF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.66

#636ECF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #636ECF

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##636ECF	#FFFFFF	#000000	##000000
##636ECF	1.00	4.50	4.66	4.66
#FFFFFF	4.50	1.00	21.00	21.00
#000000	4.66	21.00	1.00	1.00
##000000	4.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#427BD3

Deuteranopia (green-blind)

#3772CD

Tritanopia (blue-blind)

#338394

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #636ecf;
/* rgb */ color: rgb(99, 110, 207);
/* oklch */ color: oklch(57.7% 0.148 275.9);

Tailwind

colors: {
  custom: {
    50: '#9697de',
    500: '#636ecf',
    950: '#000000',
  },
}

SCSS

$custom: #636ecf;
$custom-light: #9697de;
$custom-dark: #000000;

JSON

{
  "hex": "#636ecf",
  "rgb": {
    "r": 99,
    "g": 110,
    "b": 207
  },
  "hsl": {
    "h": 233.889,
    "s": 52.941,
    "l": 60
  },
  "oklch": {
    "l": 0.57661,
    "c": 0.14784,
    "h": 275.9
  },
  "luminance": 0.1831
}

Semantic roles & 50–950 ramp

primary

#636ECF

secondary

#DCD7B2

accent

#CE4BDC

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #636ECF

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

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