#638EEC#638EEC

#638EEC is a light, vivid blue. Relative luminance 0.281; OKLCH L 65.9% C 0.148 H 264.2°. Best body text is #000000 at 6.61:1 contrast (WCAG AA passes).

Color values

HEX#638EEC
RGBrgb(99, 142, 236)
HSLhsl(221, 78%, 66%)
HSVhsv(221, 58%, 93%)
CMYKcmyk(58.1%, 39.8%, 0%, 7.5%)
CIE-LABlab(59.94, 12.95, -51.90)
CIE-LCHlch(59.94, 53.49, 284.01°)
OKLaboklab(65.89% -0.015 -0.1475)
OKLCHoklch(65.89% 0.148 264.2)
XYZxyz(29.9537, 28.0523, 83.1768)
Luminance0.2806 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#638EEC #ECC163
analogous
#63D2EC #638EEC #7C63EC
triadic
#638EEC #EC638E #8EEC63
tetradic
#638EEC #EC63D2 #ECC163 #63EC7C
square
#638EEC #EC63D2 #ECC163 #63EC7C
split-complementary
#638EEC #EC7C63 #D2EC63
monochromatic
#174BBE #2C66E5 #638EEC #9AB6F3 #D0DDF9

Accessibility & contrast

On white

3.18
#638EEC on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

6.61
#638EEC on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638EEC
6.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##638EEC#FFFFFF#000000##000000
##638EEC1.003.186.616.61
#FFFFFF3.181.0021.0021.00
#0000006.6121.001.001.00
##0000006.6121.001.001.00

Color blindness preview

Protanopia (red-blind)
#6697F0
Deuteranopia (green-blind)
#538BEA
Tritanopia (blue-blind)
#00A3B2
Achromatopsia (no color)
#909090

Design tokens & code

CSS
--color: #638eec;
/* rgb */ color: rgb(99, 142, 236);
/* oklch */ color: oklch(65.9% 0.148 264.2);
Tailwind
colors: {
  custom: {
    50: '#99aef2',
    500: '#638eec',
    950: '#000000',
  },
}
SCSS
$custom: #638eec;
$custom-light: #99aef2;
$custom-dark: #000000;
JSON
{
  "hex": "#638eec",
  "rgb": {
    "r": 99,
    "g": 142,
    "b": 236
  },
  "hsl": {
    "h": 221.168,
    "s": 78.286,
    "l": 65.686
  },
  "oklch": {
    "l": 0.65892,
    "c": 0.14822,
    "h": 264.2
  },
  "luminance": 0.28055
}

Semantic roles & 50–950 ramp

primary
#638EEC
secondary
#ECDEBF
accent
#990BDB
background
#FAFAFE
surface
#F3F4FD
border
#CDCED5
text
#0F1017
muted
#7F7F85

Preview Lab

Preview with #638EEC

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

Preview Lab → · Contrast checker → · Palette generator →

#638EEC Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva