#636FDF#636FDF

#636FDF is a mid, vivid blue. Relative luminance 0.193; OKLCH L 58.9% C 0.169 H 275.4°. Best body text is #000000 at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#636FDF
RGB	rgb(99, 111, 223)
HSL	hsl(234, 66%, 63%)
HSV	hsv(234, 56%, 87%)
CMYK	cmyk(55.6%, 50.2%, 0%, 12.5%)
CIE-LAB	lab(51.09, 27.48, -58.78)
CIE-LCH	lch(51.09, 64.88, 295.06°)
OKLab	oklab(58.9% 0.0157 -0.168)
OKLCH	oklch(58.9% 0.169 275.4)
XYZ	xyz(24.1450, 19.3475, 72.2598)
Luminance	0.1935 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#636FDF #DFD363

analogous

#63ADDF #636FDF #9563DF

triadic

#636FDF #DF636F #6FDF63

tetradic

#636FDF #DF63AD #DFD363 #63DF95

square

#636FDF #DF63AD #DFD363 #63DF95

split-complementary

#636FDF #DF9563 #ADDF63

monochromatic

#222FA6 #3040D5 #636FDF #969EE9 #C9CDF4

Accessibility & contrast

On white

4.31

#636FDF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.87

#636FDF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #636FDF

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##636FDF	#FFFFFF	#000000	##000000
##636FDF	1.00	4.31	4.87	4.87
#FFFFFF	4.31	1.00	21.00	21.00
#000000	4.87	21.00	1.00	1.00
##000000	4.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#357FE3

Deuteranopia (green-blind)

#2075DD

Tritanopia (blue-blind)

#1D889C

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #636fdf;
/* rgb */ color: rgb(99, 111, 223);
/* oklch */ color: oklch(58.9% 0.169 275.4);

Tailwind

colors: {
  custom: {
    50: '#9998ea',
    500: '#636fdf',
    950: '#000000',
  },
}

SCSS

$custom: #636fdf;
$custom-light: #9998ea;
$custom-dark: #000000;

JSON

{
  "hex": "#636fdf",
  "rgb": {
    "r": 99,
    "g": 111,
    "b": 223
  },
  "hsl": {
    "h": 234.194,
    "s": 65.957,
    "l": 63.137
  },
  "oklch": {
    "l": 0.58898,
    "c": 0.1687,
    "h": 275.4
  },
  "luminance": 0.19349
}

Semantic roles & 50–950 ramp

primary

#636FDF

secondary

#E5E1B9

accent

#BC18CE

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #636FDF

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

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