#639EF8#639EF8

#639EF8 is a light, vivid blue. Relative luminance 0.339; OKLCH L 69.9% C 0.147 H 258.6°. Best body text is #000000 at 7.78:1 contrast (WCAG AA passes).

Color values

HEX	#639EF8
RGB	rgb(99, 158, 248)
HSL	hsl(216, 91%, 68%)
HSV	hsv(216, 60%, 97%)
CMYK	cmyk(60.1%, 36.3%, 0%, 2.7%)
CIE-LAB	lab(64.87, 7.44, -50.69)
CIE-LCH	lch(64.87, 51.23, 278.35°)
OKLab	oklab(69.91% -0.029 -0.1437)
OKLCH	oklch(69.91% 0.147 258.6)
XYZ	xyz(34.3097, 33.8806, 93.5203)
Luminance	0.3388 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#639EF8 #F8BD63

analogous

#63E8F8 #639EF8 #7363F8

triadic

#639EF8 #F8639E #9EF863

tetradic

#639EF8 #F863E8 #F8BD63 #63F873

square

#639EF8 #F863E8 #F8BD63 #63F873

split-complementary

#639EF8 #F87363 #E8F863

monochromatic

#0A5BD7 #287AF5 #639EF8 #9EC2FB #D8E7FD

Accessibility & contrast

On white

2.70

#639EF8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.78

#639EF8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #639EF8

7.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##639EF8	#FFFFFF	#000000	##000000
##639EF8	1.00	2.70	7.78	7.78
#FFFFFF	2.70	1.00	21.00	21.00
#000000	7.78	21.00	1.00	1.00
##000000	7.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#78A5FC

Deuteranopia (green-blind)

#6497F6

Tritanopia (blue-blind)

#00B2BF

Achromatopsia (no color)

#9D9D9D

Design tokens & code

CSS

--color: #639ef8;
/* rgb */ color: rgb(99, 158, 248);
/* oklch */ color: oklch(69.9% 0.147 258.6);

Tailwind

colors: {
  custom: {
    50: '#9bbafb',
    500: '#639ef8',
    950: '#000000',
  },
}

SCSS

$custom: #639ef8;
$custom-light: #9bbafb;
$custom-dark: #000000;

JSON

{
  "hex": "#639ef8",
  "rgb": {
    "r": 99,
    "g": 158,
    "b": 248
  },
  "hsl": {
    "h": 216.242,
    "s": 91.411,
    "l": 68.039
  },
  "oklch": {
    "l": 0.69913,
    "c": 0.14663,
    "h": 258.6
  },
  "luminance": 0.33884
}

Semantic roles & 50–950 ramp

primary

#639EF8

secondary

#F2E0C5

accent

#8B00E6

background

#FAFBFF

surface

#F4F6FF

border

#CED0D7

text

#0F1117

muted

#7F8085

Preview Lab

Preview with #639EF8

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

Preview Lab → · Contrast checker → · Palette generator →