#638DF9#638DF9

#638DF9 is a light, vivid blue. Relative luminance 0.285; OKLCH L 66.5% C 0.167 H 266.0°. Best body text is #000000 at 6.71:1 contrast (WCAG AA passes).

Color values

HEX	#638DF9
RGB	rgb(99, 141, 249)
HSL	hsl(223, 93%, 68%)
HSV	hsv(223, 60%, 98%)
CMYK	cmyk(60.2%, 43.4%, 0%, 2.4%)
CIE-LAB	lab(60.37, 17.78, -58.38)
CIE-LCH	lch(60.37, 61.03, 286.94°)
OKLab	oklab(66.46% -0.0116 -0.1665)
OKLCH	oklch(66.46% 0.167 266)
XYZ	xyz(31.7635, 28.5392, 93.4389)
Luminance	0.2854 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638DF9 #F9CF63

analogous

#63D8F9 #638DF9 #8463F9

triadic

#638DF9 #F9638D #8DF963

tetradic

#638DF9 #F963D8 #F9CF63 #63F984

square

#638DF9 #F963D8 #F9CF63 #63F984

split-complementary

#638DF9 #F98463 #D8F963

monochromatic

#0843D9 #2862F7 #638DF9 #9EB8FB #D9E3FE

Accessibility & contrast

On white

3.13

#638DF9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.71

#638DF9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638DF9

6.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638DF9	#FFFFFF	#000000	##000000
##638DF9	1.00	3.13	6.71	6.71
#FFFFFF	3.13	1.00	21.00	21.00
#000000	6.71	21.00	1.00	1.00
##000000	6.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B99FD

Deuteranopia (green-blind)

#458BF7

Tritanopia (blue-blind)

#00A5B7

Achromatopsia (no color)

#929292

Design tokens & code

CSS

--color: #638df9;
/* rgb */ color: rgb(99, 141, 249);
/* oklch */ color: oklch(66.5% 0.167 266.0);

Tailwind

colors: {
  custom: {
    50: '#9badfc',
    500: '#638df9',
    950: '#000000',
  },
}

SCSS

$custom: #638df9;
$custom-light: #9badfc;
$custom-dark: #000000;

JSON

{
  "hex": "#638df9",
  "rgb": {
    "r": 99,
    "g": 141,
    "b": 249
  },
  "hsl": {
    "h": 223.2,
    "s": 92.593,
    "l": 68.235
  },
  "oklch": {
    "l": 0.66456,
    "c": 0.16687,
    "h": 266
  },
  "luminance": 0.28542
}

Semantic roles & 50–950 ramp

primary

#638DF9

secondary

#F3E6C5

accent

#A500E6

background

#FAFAFF

surface

#F4F4FF

border

#CECED7

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638DF9

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

Preview Lab → · Contrast checker → · Palette generator →