#637AEF#637AEF

#637AEF is a light, vivid blue. Relative luminance 0.228; OKLCH L 62.1% C 0.176 H 272.0°. Best body text is #000000 at 5.56:1 contrast (WCAG AA passes).

Color values

HEX	#637AEF
RGB	rgb(99, 122, 239)
HSL	hsl(230, 81%, 66%)
HSV	hsv(230, 59%, 94%)
CMYK	cmyk(58.6%, 49%, 0%, 6.3%)
CIE-LAB	lab(54.87, 25.96, -61.67)
CIE-LCH	lch(54.87, 66.91, 292.83°)
OKLab	oklab(62.07% 0.006 -0.1764)
OKLCH	oklch(62.07% 0.176 272)
XYZ	xyz(27.6800, 22.8015, 84.5871)
Luminance	0.2280 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637AEF #EFD863

analogous

#63C0EF #637AEF #9263EF

triadic

#637AEF #EF637A #7AEF63

tetradic

#637AEF #EF63C0 #EFD863 #63EF92

square

#637AEF #EF63C0 #EFD863 #63EF92

split-complementary

#637AEF #EF9263 #C0EF63

monochromatic

#1431C4 #2B4BE9 #637AEF #9BA9F5 #D2D9FA

Accessibility & contrast

On white

3.78

#637AEF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.56

#637AEF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637AEF

5.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637AEF	#FFFFFF	#000000	##000000
##637AEF	1.00	3.78	5.56	5.56
#FFFFFF	3.78	1.00	21.00	21.00
#000000	5.56	21.00	1.00	1.00
##000000	5.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D8AF3

Deuteranopia (green-blind)

#237DED

Tritanopia (blue-blind)

#0095A9

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #637aef;
/* rgb */ color: rgb(99, 122, 239);
/* oklch */ color: oklch(62.1% 0.176 272.0);

Tailwind

colors: {
  custom: {
    50: '#9aa0f5',
    500: '#637aef',
    950: '#000000',
  },
}

SCSS

$custom: #637aef;
$custom-light: #9aa0f5;
$custom-dark: #000000;

JSON

{
  "hex": "#637aef",
  "rgb": {
    "r": 99,
    "g": 122,
    "b": 239
  },
  "hsl": {
    "h": 230.143,
    "s": 81.395,
    "l": 66.275
  },
  "oklch": {
    "l": 0.62069,
    "c": 0.17646,
    "h": 272
  },
  "luminance": 0.22804
}

Semantic roles & 50–950 ramp

primary

#637AEF

secondary

#EEE6C0

accent

#BB08DE

background

#FAF9FF

surface

#F4F2FE

border

#CECCD6

text

#0F0E17

muted

#7F7E85

Preview Lab

Preview with #637AEF

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

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