#637EF2#637EF2

#637EF2 is a light, vivid blue. Relative luminance 0.240; OKLCH L 63.0% C 0.176 H 270.8°. Best body text is #000000 at 5.80:1 contrast (WCAG AA passes).

Color values

HEX	#637EF2
RGB	rgb(99, 126, 242)
HSL	hsl(229, 85%, 67%)
HSV	hsv(229, 59%, 95%)
CMYK	cmyk(59.1%, 47.9%, 0%, 5.1%)
CIE-LAB	lab(56.07, 24.51, -61.40)
CIE-LCH	lch(56.07, 66.12, 291.76°)
OKLab	oklab(63.04% 0.0024 -0.1755)
OKLCH	oklch(63.04% 0.176 270.8)
XYZ	xyz(28.6281, 23.9829, 87.1077)
Luminance	0.2399 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637EF2 #F2D763

analogous

#63C6F2 #637EF2 #9063F2

triadic

#637EF2 #F2637E #7EF263

tetradic

#637EF2 #F263C6 #F2D763 #63F290

square

#637EF2 #F263C6 #F2D763 #63F290

split-complementary

#637EF2 #F29063 #C6F263

monochromatic

#1134CA #2B4FED #637EF2 #9BADF7 #D4DBFB

Accessibility & contrast

On white

3.62

#637EF2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.80

#637EF2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637EF2

5.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637EF2	#FFFFFF	#000000	##000000
##637EF2	1.00	3.62	5.80	5.80
#FFFFFF	3.62	1.00	21.00	21.00
#000000	5.80	21.00	1.00	1.00
##000000	5.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#438DF6

Deuteranopia (green-blind)

#2A80F0

Tritanopia (blue-blind)

#0098AC

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #637ef2;
/* rgb */ color: rgb(99, 126, 242);
/* oklch */ color: oklch(63.0% 0.176 270.8);

Tailwind

colors: {
  custom: {
    50: '#9ba3f7',
    500: '#637ef2',
    950: '#000000',
  },
}

SCSS

$custom: #637ef2;
$custom-light: #9ba3f7;
$custom-dark: #000000;

JSON

{
  "hex": "#637ef2",
  "rgb": {
    "r": 99,
    "g": 126,
    "b": 242
  },
  "hsl": {
    "h": 228.671,
    "s": 84.615,
    "l": 66.863
  },
  "oklch": {
    "l": 0.6304,
    "c": 0.17555,
    "h": 270.8
  },
  "luminance": 0.23985
}

Semantic roles & 50–950 ramp

primary

#637EF2

secondary

#EFE7C2

accent

#B704E1

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#0F0F17

muted

#7F7E85

Preview Lab

Preview with #637EF2

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

Preview Lab → · Contrast checker → · Palette generator →