#637DFD#637DFD

#637DFD is a light, vivid blue. Relative luminance 0.244; OKLCH L 63.6% C 0.191 H 271.3°. Best body text is #000000 at 5.88:1 contrast (WCAG AA passes).

Color values

HEX	#637DFD
RGB	rgb(99, 125, 253)
HSL	hsl(230, 97%, 69%)
HSV	hsv(230, 61%, 99%)
CMYK	cmyk(60.9%, 50.6%, 0%, 0.8%)
CIE-LAB	lab(56.50, 28.72, -66.81)
CIE-LCH	lch(56.50, 72.72, 293.26°)
OKLab	oklab(63.58% 0.0044 -0.1914)
OKLCH	oklch(63.58% 0.191 271.3)
XYZ	xyz(30.2029, 24.4092, 96.0293)
Luminance	0.2441 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637DFD #FDE363

analogous

#63CAFD #637DFD #9663FD

triadic

#637DFD #FD637D #7DFD63

tetradic

#637DFD #FD63CA #FDE363 #63FD96

square

#637DFD #FD63CA #FDE363 #63FD96

split-complementary

#637DFD #FD9663 #CAFD63

monochromatic

#0329E3 #274BFC #637DFD #9FAFFE #DCE2FF

Accessibility & contrast

On white

3.57

#637DFD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.88

#637DFD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637DFD

5.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637DFD	#FFFFFF	#000000	##000000
##637DFD	1.00	3.57	5.88	5.88
#FFFFFF	3.57	1.00	21.00	21.00
#000000	5.88	21.00	1.00	1.00
##000000	5.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#338FFF

Deuteranopia (green-blind)

#0081FA

Tritanopia (blue-blind)

#009BB1

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #637dfd;
/* rgb */ color: rgb(99, 125, 253);
/* oklch */ color: oklch(63.6% 0.191 271.3);

Tailwind

colors: {
  custom: {
    50: '#9ca2ff',
    500: '#637dfd',
    950: '#000000',
  },
}

SCSS

$custom: #637dfd;
$custom-light: #9ca2ff;
$custom-dark: #000000;

JSON

{
  "hex": "#637dfd",
  "rgb": {
    "r": 99,
    "g": 125,
    "b": 253
  },
  "hsl": {
    "h": 229.87,
    "s": 97.468,
    "l": 69.02
  },
  "oklch": {
    "l": 0.63579,
    "c": 0.19148,
    "h": 271.3
  },
  "luminance": 0.24412
}

Semantic roles & 50–950 ramp

primary

#637DFD

secondary

#F4EDC7

accent

#BF00E6

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#0F0F18

muted

#7F7E86

Preview Lab

Preview with #637DFD

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

Preview Lab → · Contrast checker → · Palette generator →