#638EF8#638EF8

#638EF8 is a light, vivid blue. Relative luminance 0.288; OKLCH L 66.6% C 0.164 H 265.5°. Best body text is #000000 at 6.76:1 contrast (WCAG AA passes).

Color values

HEX	#638EF8
RGB	rgb(99, 142, 248)
HSL	hsl(223, 91%, 68%)
HSV	hsv(223, 60%, 97%)
CMYK	cmyk(60.1%, 42.7%, 0%, 2.7%)
CIE-LAB	lab(60.58, 16.86, -57.50)
CIE-LCH	lch(60.58, 59.92, 286.34°)
OKLab	oklab(66.6% -0.0128 -0.1639)
OKLCH	oklch(66.6% 0.164 265.5)
XYZ	xyz(31.7561, 28.7732, 92.6690)
Luminance	0.2878 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638EF8 #F8CD63

analogous

#63D8F8 #638EF8 #8363F8

triadic

#638EF8 #F8638E #8EF863

tetradic

#638EF8 #F863D8 #F8CD63 #63F883

square

#638EF8 #F863D8 #F8CD63 #63F883

split-complementary

#638EF8 #F88363 #D8F863

monochromatic

#0A45D7 #2864F5 #638EF8 #9EB8FB #D8E3FD

Accessibility & contrast

On white

3.11

#638EF8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.76

#638EF8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638EF8

6.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638EF8	#FFFFFF	#000000	##000000
##638EF8	1.00	3.11	6.76	6.76
#FFFFFF	3.11	1.00	21.00	21.00
#000000	6.76	21.00	1.00	1.00
##000000	6.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E99FC

Deuteranopia (green-blind)

#488CF6

Tritanopia (blue-blind)

#00A6B7

Achromatopsia (no color)

#929292

Design tokens & code

CSS

--color: #638ef8;
/* rgb */ color: rgb(99, 142, 248);
/* oklch */ color: oklch(66.6% 0.164 265.5);

Tailwind

colors: {
  custom: {
    50: '#9baefb',
    500: '#638ef8',
    950: '#000000',
  },
}

SCSS

$custom: #638ef8;
$custom-light: #9baefb;
$custom-dark: #000000;

JSON

{
  "hex": "#638ef8",
  "rgb": {
    "r": 99,
    "g": 142,
    "b": 248
  },
  "hsl": {
    "h": 222.685,
    "s": 91.411,
    "l": 68.039
  },
  "oklch": {
    "l": 0.66598,
    "c": 0.16436,
    "h": 265.5
  },
  "luminance": 0.28776
}

Semantic roles & 50–950 ramp

primary

#638EF8

secondary

#F2E5C5

accent

#A300E6

background

#FAFAFF

surface

#F4F4FF

border

#CECED7

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638EF8

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

Preview Lab → · Contrast checker → · Palette generator →