#637EE6#637EE6

#637EE6 is a light, vivid blue. Relative luminance 0.233; OKLCH L 62.3% C 0.159 H 270.3°. Best body text is #000000 at 5.66:1 contrast (WCAG AA passes).

Color values

HEX	#637EE6
RGB	rgb(99, 126, 230)
HSL	hsl(228, 72%, 65%)
HSV	hsv(228, 57%, 90%)
CMYK	cmyk(57%, 45.2%, 0%, 9.8%)
CIE-LAB	lab(55.37, 20.61, -55.85)
CIE-LCH	lch(55.37, 59.53, 290.25°)
OKLab	oklab(62.28% 0.0008 -0.1592)
OKLCH	oklch(62.28% 0.159 270.3)
XYZ	xyz(26.8846, 23.2855, 77.9254)
Luminance	0.2329 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637EE6 #E6CB63

analogous

#63BFE6 #637EE6 #8A63E6

triadic

#637EE6 #E6637E #7EE663

tetradic

#637EE6 #E663BF #E6CB63 #63E68A

square

#637EE6 #E663BF #E6CB63 #63E68A

split-complementary

#637EE6 #E68A63 #BFE663

monochromatic

#1D3BB2 #2E52DE #637EE6 #98AAEE #CCD5F7

Accessibility & contrast

On white

3.71

#637EE6 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.66

#637EE6 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637EE6

5.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637EE6	#FFFFFF	#000000	##000000
##637EE6	1.00	3.71	5.66	5.66
#FFFFFF	3.71	1.00	21.00	21.00
#000000	5.66	21.00	1.00	1.00
##000000	5.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E8BEA

Deuteranopia (green-blind)

#3C7FE4

Tritanopia (blue-blind)

#0095A7

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #637ee6;
/* rgb */ color: rgb(99, 126, 230);
/* oklch */ color: oklch(62.3% 0.159 270.3);

Tailwind

colors: {
  custom: {
    50: '#99a3ee',
    500: '#637ee6',
    950: '#000000',
  },
}

SCSS

$custom: #637ee6;
$custom-light: #99a3ee;
$custom-dark: #000000;

JSON

{
  "hex": "#637ee6",
  "rgb": {
    "r": 99,
    "g": 126,
    "b": 230
  },
  "hsl": {
    "h": 227.634,
    "s": 72.376,
    "l": 64.51
  },
  "oklch": {
    "l": 0.62276,
    "c": 0.15921,
    "h": 270.3
  },
  "luminance": 0.23288
}

Semantic roles & 50–950 ramp

primary

#637EE6

secondary

#E9E0BC

accent

#AC11D4

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0F0F16

muted

#7E7E84

Preview Lab

Preview with #637EE6

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

Preview Lab → · Contrast checker → · Palette generator →