#638BFD#638BFD

#638BFD is a light, vivid blue. Relative luminance 0.282; OKLCH L 66.3% C 0.175 H 267.0°. Best body text is #000000 at 6.64:1 contrast (WCAG AA passes).

Color values

HEX	#638BFD
RGB	rgb(99, 139, 253)
HSL	hsl(224, 97%, 69%)
HSV	hsv(224, 61%, 99%)
CMYK	cmyk(60.9%, 45.1%, 0%, 0.8%)
CIE-LAB	lab(60.08, 20.29, -61.05)
CIE-LCH	lch(60.08, 64.34, 288.39°)
OKLab	oklab(66.3% -0.009 -0.1743)
OKLCH	oklch(66.3% 0.175 267)
XYZ	xyz(32.1018, 28.2070, 96.6622)
Luminance	0.2821 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638BFD #FDD563

analogous

#63D8FD #638BFD #8863FD

triadic

#638BFD #FD638B #8BFD63

tetradic

#638BFD #FD63D8 #FDD563 #63FD88

square

#638BFD #FD63D8 #FDD563 #63FD88

split-complementary

#638BFD #FD8863 #D8FD63

monochromatic

#033DE3 #275EFC #638BFD #9FB8FE #DCE5FF

Accessibility & contrast

On white

3.16

#638BFD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.64

#638BFD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638BFD

6.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638BFD	#FFFFFF	#000000	##000000
##638BFD	1.00	3.16	6.64	6.64
#FFFFFF	3.16	1.00	21.00	21.00
#000000	6.64	21.00	1.00	1.00
##000000	6.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5498FF

Deuteranopia (green-blind)

#3B8AFB

Tritanopia (blue-blind)

#00A5B8

Achromatopsia (no color)

#919191

Design tokens & code

CSS

--color: #638bfd;
/* rgb */ color: rgb(99, 139, 253);
/* oklch */ color: oklch(66.3% 0.175 267.0);

Tailwind

colors: {
  custom: {
    50: '#9cacff',
    500: '#638bfd',
    950: '#000000',
  },
}

SCSS

$custom: #638bfd;
$custom-light: #9cacff;
$custom-dark: #000000;

JSON

{
  "hex": "#638bfd",
  "rgb": {
    "r": 99,
    "g": 139,
    "b": 253
  },
  "hsl": {
    "h": 224.416,
    "s": 97.468,
    "l": 69.02
  },
  "oklch": {
    "l": 0.66301,
    "c": 0.17457,
    "h": 267
  },
  "luminance": 0.2821
}

Semantic roles & 50–950 ramp

primary

#638BFD

secondary

#F4E9C7

accent

#AA00E6

background

#FAFAFF

surface

#F4F4FF

border

#CECED7

text

#0F1018

muted

#7F7F86

Preview Lab

Preview with #638BFD

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

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