#637EE7#637EE7

#637EE7 is a light, vivid blue. Relative luminance 0.233; OKLCH L 62.3% C 0.161 H 270.3°. Best body text is #000000 at 5.67:1 contrast (WCAG AA passes).

Color values

HEX	#637EE7
RGB	rgb(99, 126, 231)
HSL	hsl(228, 73%, 65%)
HSV	hsv(228, 57%, 91%)
CMYK	cmyk(57.1%, 45.5%, 0%, 9.4%)
CIE-LAB	lab(55.42, 20.93, -56.32)
CIE-LCH	lch(55.42, 60.08, 290.39°)
OKLab	oklab(62.34% 0.001 -0.1606)
OKLCH	oklch(62.34% 0.161 270.3)
XYZ	xyz(27.0255, 23.3418, 78.6671)
Luminance	0.2334 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637EE7 #E7CC63

analogous

#63C0E7 #637EE7 #8A63E7

triadic

#637EE7 #E7637E #7EE763

tetradic

#637EE7 #E763C0 #E7CC63 #63E78A

square

#637EE7 #E763C0 #E7CC63 #63E78A

split-complementary

#637EE7 #E78A63 #C0E763

monochromatic

#1C3BB4 #2E52DF #637EE7 #98AAEF #CDD6F7

Accessibility & contrast

On white

3.70

#637EE7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.67

#637EE7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637EE7

5.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637EE7	#FFFFFF	#000000	##000000
##637EE7	1.00	3.70	5.67	5.67
#FFFFFF	3.70	1.00	21.00	21.00
#000000	5.67	21.00	1.00	1.00
##000000	5.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D8BEB

Deuteranopia (green-blind)

#3B7FE5

Tritanopia (blue-blind)

#0095A7

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #637ee7;
/* rgb */ color: rgb(99, 126, 231);
/* oklch */ color: oklch(62.3% 0.161 270.3);

Tailwind

colors: {
  custom: {
    50: '#99a3ef',
    500: '#637ee7',
    950: '#000000',
  },
}

SCSS

$custom: #637ee7;
$custom-light: #99a3ef;
$custom-dark: #000000;

JSON

{
  "hex": "#637ee7",
  "rgb": {
    "r": 99,
    "g": 126,
    "b": 231
  },
  "hsl": {
    "h": 227.727,
    "s": 73.333,
    "l": 64.706
  },
  "oklch": {
    "l": 0.62338,
    "c": 0.16058,
    "h": 270.3
  },
  "luminance": 0.23344
}

Semantic roles & 50–950 ramp

primary

#637EE7

secondary

#EAE0BC

accent

#AD10D5

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0F0F16

muted

#7E7E84

Preview Lab

Preview with #637EE7

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

Preview Lab → · Contrast checker → · Palette generator →