#638CF9#638CF9

#638CF9 is a light, vivid blue. Relative luminance 0.282; OKLCH L 66.3% C 0.168 H 266.4°. Best body text is #000000 at 6.65:1 contrast (WCAG AA passes).

Color values

HEX	#638CF9
RGB	rgb(99, 140, 249)
HSL	hsl(224, 93%, 68%)
HSV	hsv(224, 60%, 98%)
CMYK	cmyk(60.2%, 43.8%, 0%, 2.4%)
CIE-LAB	lab(60.11, 18.38, -58.80)
CIE-LCH	lch(60.11, 61.61, 287.36°)
OKLab	oklab(66.26% -0.0106 -0.1677)
OKLCH	oklch(66.26% 0.168 266.4)
XYZ	xyz(31.6167, 28.2457, 93.3900)
Luminance	0.2825 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638CF9 #F9D063

analogous

#63D7F9 #638CF9 #8563F9

triadic

#638CF9 #F9638C #8CF963

tetradic

#638CF9 #F963D7 #F9D063 #63F985

square

#638CF9 #F963D7 #F9D063 #63F985

split-complementary

#638CF9 #F98563 #D7F963

monochromatic

#0841D9 #2861F7 #638CF9 #9EB7FB #D9E3FE

Accessibility & contrast

On white

3.16

#638CF9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.65

#638CF9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638CF9

6.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638CF9	#FFFFFF	#000000	##000000
##638CF9	1.00	3.16	6.65	6.65
#FFFFFF	3.16	1.00	21.00	21.00
#000000	6.65	21.00	1.00	1.00
##000000	6.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5998FD

Deuteranopia (green-blind)

#438BF7

Tritanopia (blue-blind)

#00A5B6

Achromatopsia (no color)

#919191

Design tokens & code

CSS

--color: #638cf9;
/* rgb */ color: rgb(99, 140, 249);
/* oklch */ color: oklch(66.3% 0.168 266.4);

Tailwind

colors: {
  custom: {
    50: '#9badfc',
    500: '#638cf9',
    950: '#000000',
  },
}

SCSS

$custom: #638cf9;
$custom-light: #9badfc;
$custom-dark: #000000;

JSON

{
  "hex": "#638cf9",
  "rgb": {
    "r": 99,
    "g": 140,
    "b": 249
  },
  "hsl": {
    "h": 223.6,
    "s": 92.593,
    "l": 68.235
  },
  "oklch": {
    "l": 0.66255,
    "c": 0.16804,
    "h": 266.4
  },
  "luminance": 0.28248
}

Semantic roles & 50–950 ramp

primary

#638CF9

secondary

#F3E6C5

accent

#A700E6

background

#FAFAFF

surface

#F4F4FF

border

#CECED7

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638CF9

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

Preview Lab → · Contrast checker → · Palette generator →