#637DF1#637DF1

#637DF1 is a light, vivid blue. Relative luminance 0.237; OKLCH L 62.8% C 0.175 H 271.1°. Best body text is #000000 at 5.73:1 contrast (WCAG AA passes).

Color values

HEX	#637DF1
RGB	rgb(99, 125, 241)
HSL	hsl(229, 84%, 67%)
HSV	hsv(229, 59%, 95%)
CMYK	cmyk(58.9%, 48.1%, 0%, 5.5%)
CIE-LAB	lab(55.75, 24.79, -61.36)
CIE-LCH	lch(55.75, 66.18, 292.00°)
OKLab	oklab(62.78% 0.0033 -0.1754)
OKLCH	oklch(62.78% 0.175 271.1)
XYZ	xyz(28.3511, 23.6685, 86.2765)
Luminance	0.2367 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637DF1 #F1D763

analogous

#63C4F1 #637DF1 #9063F1

triadic

#637DF1 #F1637D #7DF163

tetradic

#637DF1 #F163C4 #F1D763 #63F190

square

#637DF1 #F163C4 #F1D763 #63F190

split-complementary

#637DF1 #F19063 #C4F163

monochromatic

#1233C8 #2B4EEC #637DF1 #9BACF6 #D3DBFB

Accessibility & contrast

On white

3.66

#637DF1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.73

#637DF1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637DF1

5.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637DF1	#FFFFFF	#000000	##000000
##637DF1	1.00	3.66	5.73	5.73
#FFFFFF	3.66	1.00	21.00	21.00
#000000	5.73	21.00	1.00	1.00
##000000	5.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#428CF5

Deuteranopia (green-blind)

#2980EF

Tritanopia (blue-blind)

#0097AB

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #637df1;
/* rgb */ color: rgb(99, 125, 241);
/* oklch */ color: oklch(62.8% 0.175 271.1);

Tailwind

colors: {
  custom: {
    50: '#9ba2f6',
    500: '#637df1',
    950: '#000000',
  },
}

SCSS

$custom: #637df1;
$custom-light: #9ba2f6;
$custom-dark: #000000;

JSON

{
  "hex": "#637df1",
  "rgb": {
    "r": 99,
    "g": 125,
    "b": 241
  },
  "hsl": {
    "h": 229.014,
    "s": 83.529,
    "l": 66.667
  },
  "oklch": {
    "l": 0.62781,
    "c": 0.17543,
    "h": 271.1
  },
  "luminance": 0.23671
}

Semantic roles & 50–950 ramp

primary

#637DF1

secondary

#EFE6C1

accent

#B806E0

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#0F0F17

muted

#7F7E85

Preview Lab

Preview with #637DF1

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

Preview Lab → · Contrast checker → · Palette generator →