#638EE7#638EE7

#638EE7 is a light, vivid blue. Relative luminance 0.278; OKLCH L 65.6% C 0.141 H 263.5°. Best body text is #000000 at 6.55:1 contrast (WCAG AA passes).

Color values

HEX	#638EE7
RGB	rgb(99, 142, 231)
HSL	hsl(220, 73%, 65%)
HSV	hsv(220, 57%, 91%)
CMYK	cmyk(57.1%, 38.5%, 0%, 9.4%)
CIE-LAB	lab(59.68, 11.33, -49.54)
CIE-LCH	lch(59.68, 50.82, 282.88°)
OKLab	oklab(65.61% -0.016 -0.1405)
OKLCH	oklch(65.61% 0.141 263.5)
XYZ	xyz(29.2375, 27.7658, 79.4044)
Luminance	0.2777 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638EE7 #E7BC63

analogous

#63D0E7 #638EE7 #7A63E7

triadic

#638EE7 #E7638E #8EE763

tetradic

#638EE7 #E763D0 #E7BC63 #63E77A

square

#638EE7 #E763D0 #E7BC63 #63E77A

split-complementary

#638EE7 #E77A63 #D0E763

monochromatic

#1C4DB4 #2E68DF #638EE7 #98B4EF #CDDBF7

Accessibility & contrast

On white

3.20

#638EE7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.55

#638EE7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638EE7

6.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638EE7	#FFFFFF	#000000	##000000
##638EE7	1.00	3.20	6.55	6.55
#FFFFFF	3.20	1.00	21.00	21.00
#000000	6.55	21.00	1.00	1.00
##000000	6.55	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6996EB

Deuteranopia (green-blind)

#588AE5

Tritanopia (blue-blind)

#00A2AF

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #638ee7;
/* rgb */ color: rgb(99, 142, 231);
/* oklch */ color: oklch(65.6% 0.141 263.5);

Tailwind

colors: {
  custom: {
    50: '#99aeef',
    500: '#638ee7',
    950: '#000000',
  },
}

SCSS

$custom: #638ee7;
$custom-light: #99aeef;
$custom-dark: #000000;

JSON

{
  "hex": "#638ee7",
  "rgb": {
    "r": 99,
    "g": 142,
    "b": 231
  },
  "hsl": {
    "h": 220.455,
    "s": 73.333,
    "l": 64.706
  },
  "oklch": {
    "l": 0.65607,
    "c": 0.14146,
    "h": 263.5
  },
  "luminance": 0.27768
}

Semantic roles & 50–950 ramp

primary

#638EE7

secondary

#EADBBC

accent

#9510D5

background

#F9FAFE

surface

#F2F4FD

border

#CCCED5

text

#0F1016

muted

#7E7F84

Preview Lab

Preview with #638EE7

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

Preview Lab → · Contrast checker → · Palette generator →