#638FEE#638FEE

#638FEE is a light, vivid blue. Relative luminance 0.285; OKLCH L 66.2% C 0.150 H 264.0°. Best body text is #000000 at 6.69:1 contrast (WCAG AA passes).

Color values

HEX	#638FEE
RGB	rgb(99, 143, 238)
HSL	hsl(221, 80%, 66%)
HSV	hsv(221, 58%, 93%)
CMYK	cmyk(58.4%, 39.9%, 0%, 6.7%)
CIE-LAB	lab(60.31, 13.00, -52.42)
CIE-LCH	lch(60.31, 54.01, 283.93°)
OKLab	oklab(66.21% -0.0156 -0.1489)
OKLCH	oklch(66.21% 0.15 264)
XYZ	xyz(30.3954, 28.4681, 84.7655)
Luminance	0.2847 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638FEE #EEC263

analogous

#63D5EE #638FEE #7C63EE

triadic

#638FEE #EE638F #8FEE63

tetradic

#638FEE #EE63D5 #EEC263 #63EE7C

square

#638FEE #EE63D5 #EEC263 #63EE7C

split-complementary

#638FEE #EE7C63 #D5EE63

monochromatic

#154CC2 #2C67E8 #638FEE #9AB7F4 #D1DEFA

Accessibility & contrast

On white

3.14

#638FEE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.69

#638FEE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638FEE

6.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638FEE	#FFFFFF	#000000	##000000
##638FEE	1.00	3.14	6.69	6.69
#FFFFFF	3.14	1.00	21.00	21.00
#000000	6.69	21.00	1.00	1.00
##000000	6.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6698F2

Deuteranopia (green-blind)

#538BEC

Tritanopia (blue-blind)

#00A4B3

Achromatopsia (no color)

#919191

Design tokens & code

CSS

--color: #638fee;
/* rgb */ color: rgb(99, 143, 238);
/* oklch */ color: oklch(66.2% 0.150 264.0);

Tailwind

colors: {
  custom: {
    50: '#9aaff4',
    500: '#638fee',
    950: '#000000',
  },
}

SCSS

$custom: #638fee;
$custom-light: #9aaff4;
$custom-dark: #000000;

JSON

{
  "hex": "#638fee",
  "rgb": {
    "r": 99,
    "g": 143,
    "b": 238
  },
  "hsl": {
    "h": 221.007,
    "s": 80.347,
    "l": 66.078
  },
  "oklch": {
    "l": 0.66214,
    "c": 0.14977,
    "h": 264
  },
  "luminance": 0.28471
}

Semantic roles & 50–950 ramp

primary

#638FEE

secondary

#EDDFC0

accent

#9A09DD

background

#FAFAFE

surface

#F3F4FD

border

#CDCED5

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638FEE

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

Preview Lab → · Contrast checker → · Palette generator →