#637EEE#637EEE

#637EEE is a light, vivid blue. Relative luminance 0.237; OKLCH L 62.8% C 0.170 H 270.6°. Best body text is #000000 at 5.75:1 contrast (WCAG AA passes).

Color values

HEX	#637EEE
RGB	rgb(99, 126, 238)
HSL	hsl(228, 80%, 66%)
HSV	hsv(228, 58%, 93%)
CMYK	cmyk(58.4%, 47.1%, 0%, 6.7%)
CIE-LAB	lab(55.83, 23.21, -59.57)
CIE-LCH	lch(55.83, 63.93, 291.29°)
OKLab	oklab(62.78% 0.0019 -0.1701)
OKLCH	oklch(62.78% 0.17 270.6)
XYZ	xyz(28.0339, 23.7452, 83.9783)
Luminance	0.2375 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637EEE #EED363

analogous

#63C4EE #637EEE #8D63EE

triadic

#637EEE #EE637E #7EEE63

tetradic

#637EEE #EE63C4 #EED363 #63EE8D

square

#637EEE #EE63C4 #EED363 #63EE8D

split-complementary

#637EEE #EE8D63 #C4EE63

monochromatic

#1537C2 #2C50E8 #637EEE #9AACF4 #D1D9FA

Accessibility & contrast

On white

3.65

#637EEE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.75

#637EEE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637EEE

5.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637EEE	#FFFFFF	#000000	##000000
##637EEE	1.00	3.65	5.75	5.75
#FFFFFF	3.65	1.00	21.00	21.00
#000000	5.75	21.00	1.00	1.00
##000000	5.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#478CF2

Deuteranopia (green-blind)

#3180EC

Tritanopia (blue-blind)

#0097AB

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #637eee;
/* rgb */ color: rgb(99, 126, 238);
/* oklch */ color: oklch(62.8% 0.170 270.6);

Tailwind

colors: {
  custom: {
    50: '#9aa3f4',
    500: '#637eee',
    950: '#000000',
  },
}

SCSS

$custom: #637eee;
$custom-light: #9aa3f4;
$custom-dark: #000000;

JSON

{
  "hex": "#637eee",
  "rgb": {
    "r": 99,
    "g": 126,
    "b": 238
  },
  "hsl": {
    "h": 228.345,
    "s": 80.347,
    "l": 66.078
  },
  "oklch": {
    "l": 0.62782,
    "c": 0.17013,
    "h": 270.6
  },
  "luminance": 0.23747
}

Semantic roles & 50–950 ramp

primary

#637EEE

secondary

#EDE4C0

accent

#B409DD

background

#FAF9FF

surface

#F3F2FE

border

#CDCCD6

text

#0F0F17

muted

#7F7E85

Preview Lab

Preview with #637EEE

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

Preview Lab → · Contrast checker → · Palette generator →