#638EFB#638EFB

#638EFB is a light, vivid blue. Relative luminance 0.290; OKLCH L 66.8% C 0.168 H 265.8°. Best body text is #000000 at 6.79:1 contrast (WCAG AA passes).

Color values

HEX	#638EFB
RGB	rgb(99, 142, 251)
HSL	hsl(223, 95%, 69%)
HSV	hsv(223, 61%, 98%)
CMYK	cmyk(60.6%, 43.4%, 0%, 1.6%)
CIE-LAB	lab(60.75, 17.84, -58.88)
CIE-LCH	lch(60.75, 61.53, 286.86°)
OKLab	oklab(66.78% -0.0122 -0.1679)
OKLCH	oklch(66.78% 0.168 265.8)
XYZ	xyz(32.2252, 28.9609, 95.1399)
Luminance	0.2896 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638EFB #FBD063

analogous

#63DAFB #638EFB #8463FB

triadic

#638EFB #FB638E #8EFB63

tetradic

#638EFB #FB63DA #FBD063 #63FB84

square

#638EFB #FB63DA #FBD063 #63FB84

split-complementary

#638EFB #FB8463 #DAFB63

monochromatic

#0643DE #2763F9 #638EFB #9FB9FD #DAE4FE

Accessibility & contrast

On white

3.09

#638EFB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.79

#638EFB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638EFB

6.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638EFB	#FFFFFF	#000000	##000000
##638EFB	1.00	3.09	6.79	6.79
#FFFFFF	3.09	1.00	21.00	21.00
#000000	6.79	21.00	1.00	1.00
##000000	6.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C9AFF

Deuteranopia (green-blind)

#458CF9

Tritanopia (blue-blind)

#00A7B8

Achromatopsia (no color)

#939393

Design tokens & code

CSS

--color: #638efb;
/* rgb */ color: rgb(99, 142, 251);
/* oklch */ color: oklch(66.8% 0.168 265.8);

Tailwind

colors: {
  custom: {
    50: '#9caefd',
    500: '#638efb',
    950: '#000000',
  },
}

SCSS

$custom: #638efb;
$custom-light: #9caefd;
$custom-dark: #000000;

JSON

{
  "hex": "#638efb",
  "rgb": {
    "r": 99,
    "g": 142,
    "b": 251
  },
  "hsl": {
    "h": 223.026,
    "s": 95,
    "l": 68.627
  },
  "oklch": {
    "l": 0.6678,
    "c": 0.16837,
    "h": 265.8
  },
  "luminance": 0.28964
}

Semantic roles & 50–950 ramp

primary

#638EFB

secondary

#F4E7C6

accent

#A500E6

background

#FAFAFF

surface

#F4F4FF

border

#CECED7

text

#0F1018

muted

#7F7F86

Preview Lab

Preview with #638EFB

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

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