#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
RGB	rgb(99, 142, 236)
HSL	hsl(221, 78%, 66%)
HSV	hsv(221, 58%, 93%)
CMYK	cmyk(58.1%, 39.8%, 0%, 7.5%)
CIE-LAB	lab(59.94, 12.95, -51.90)
CIE-LCH	lch(59.94, 53.49, 284.01°)
OKLab	oklab(65.89% -0.015 -0.1475)
OKLCH	oklch(65.89% 0.148 264.2)
XYZ	xyz(29.9537, 28.0523, 83.1768)
Luminance	0.2806 (WCAG relative)
Temperature	cool
Family	blue

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
##638EEC	1.00	3.18	6.61	6.61
#FFFFFF	3.18	1.00	21.00	21.00
#000000	6.61	21.00	1.00	1.00
##000000	6.61	21.00	1.00	1.00

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 →