#637DE7#637DE7

#637DE7 is a light, vivid blue. Relative luminance 0.231; OKLCH L 62.1% C 0.162 H 270.7°. Best body text is #000000 at 5.62:1 contrast (WCAG AA passes).

Color values

HEX	#637DE7
RGB	rgb(99, 125, 231)
HSL	hsl(228, 73%, 65%)
HSV	hsv(228, 57%, 91%)
CMYK	cmyk(57.1%, 45.9%, 0%, 9.4%)
CIE-LAB	lab(55.16, 21.54, -56.74)
CIE-LCH	lch(55.16, 60.69, 290.79°)
OKLab	oklab(62.14% 0.002 -0.1618)
OKLCH	oklch(62.14% 0.162 270.7)
XYZ	xyz(26.8982, 23.0873, 78.6247)
Luminance	0.2309 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637DE7 #E7CD63

analogous

#63BFE7 #637DE7 #8B63E7

triadic

#637DE7 #E7637D #7DE763

tetradic

#637DE7 #E763BF #E7CD63 #63E78B

square

#637DE7 #E763BF #E7CD63 #63E78B

split-complementary

#637DE7 #E78B63 #BFE763

monochromatic

#1C3AB4 #2E51DF #637DE7 #98A9EF #CDD5F7

Accessibility & contrast

On white

3.74

#637DE7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.62

#637DE7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637DE7

5.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637DE7	#FFFFFF	#000000	##000000
##637DE7	1.00	3.74	5.62	5.62
#FFFFFF	3.74	1.00	21.00	21.00
#000000	5.62	21.00	1.00	1.00
##000000	5.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4B8AEB

Deuteranopia (green-blind)

#387FE5

Tritanopia (blue-blind)

#0095A7

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #637de7;
/* rgb */ color: rgb(99, 125, 231);
/* oklch */ color: oklch(62.1% 0.162 270.7);

Tailwind

colors: {
  custom: {
    50: '#99a2ef',
    500: '#637de7',
    950: '#000000',
  },
}

SCSS

$custom: #637de7;
$custom-light: #99a2ef;
$custom-dark: #000000;

JSON

{
  "hex": "#637de7",
  "rgb": {
    "r": 99,
    "g": 125,
    "b": 231
  },
  "hsl": {
    "h": 228.182,
    "s": 73.333,
    "l": 64.706
  },
  "oklch": {
    "l": 0.62139,
    "c": 0.16183,
    "h": 270.7
  },
  "luminance": 0.23089
}

Semantic roles & 50–950 ramp

primary

#637DE7

secondary

#EAE1BC

accent

#AF10D5

background

#FAF9FE

surface

#F3F2FD

border

#CDCCD5

text

#0F0F16

muted

#7F7E84

Preview Lab

Preview with #637DE7

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

Preview Lab → · Contrast checker → · Palette generator →