#637DF7#637DF7

#637DF7 is a light, vivid blue. Relative luminance 0.240; OKLCH L 63.2% C 0.183 H 271.2°. Best body text is #000000 at 5.81:1 contrast (WCAG AA passes).

Color values

HEX	#637DF7
RGB	rgb(99, 125, 247)
HSL	hsl(229, 90%, 68%)
HSV	hsv(229, 60%, 97%)
CMYK	cmyk(59.9%, 49.4%, 0%, 3.1%)
CIE-LAB	lab(56.12, 26.75, -64.09)
CIE-LCH	lch(56.12, 69.45, 292.66°)
OKLab	oklab(63.18% 0.0039 -0.1834)
OKLCH	oklch(63.18% 0.183 271.2)
XYZ	xyz(29.2621, 24.0329, 91.0744)
Luminance	0.2404 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637DF7 #F7DD63

analogous

#63C7F7 #637DF7 #9363F7

triadic

#637DF7 #F7637D #7DF763

tetradic

#637DF7 #F763C7 #F7DD63 #63F793

square

#637DF7 #F763C7 #F7DD63 #63F793

split-complementary

#637DF7 #F79363 #C7F763

monochromatic

#0B2ED5 #294CF4 #637DF7 #9DAEFA #D7DEFD

Accessibility & contrast

On white

3.62

#637DF7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.81

#637DF7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637DF7

5.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637DF7	#FFFFFF	#000000	##000000
##637DF7	1.00	3.62	5.81	5.81
#FFFFFF	3.62	1.00	21.00	21.00
#000000	5.81	21.00	1.00	1.00
##000000	5.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B8DFB

Deuteranopia (green-blind)

#1A80F4

Tritanopia (blue-blind)

#0099AE

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #637df7;
/* rgb */ color: rgb(99, 125, 247);
/* oklch */ color: oklch(63.2% 0.183 271.2);

Tailwind

colors: {
  custom: {
    50: '#9ca2fa',
    500: '#637df7',
    950: '#000000',
  },
}

SCSS

$custom: #637df7;
$custom-light: #9ca2fa;
$custom-dark: #000000;

JSON

{
  "hex": "#637df7",
  "rgb": {
    "r": 99,
    "g": 125,
    "b": 247
  },
  "hsl": {
    "h": 229.459,
    "s": 90.244,
    "l": 67.843
  },
  "oklch": {
    "l": 0.63176,
    "c": 0.18349,
    "h": 271.2
  },
  "luminance": 0.24035
}

Semantic roles & 50–950 ramp

primary

#637DF7

secondary

#F2EAC4

accent

#BD00E6

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#0F0F17

muted

#7F7E85

Preview Lab

Preview with #637DF7

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

Preview Lab → · Contrast checker → · Palette generator →