#637CF0#637CF0

#637CF0 is a light, vivid blue. Relative luminance 0.234; OKLCH L 62.5% C 0.175 H 271.3°. Best body text is #000000 at 5.67:1 contrast (WCAG AA passes).

Color values

HEX	#637CF0
RGB	rgb(99, 124, 240)
HSL	hsl(229, 82%, 66%)
HSV	hsv(229, 59%, 94%)
CMYK	cmyk(58.8%, 48.3%, 0%, 5.9%)
CIE-LAB	lab(55.44, 25.07, -61.31)
CIE-LCH	lch(55.44, 66.24, 292.24°)
OKLab	oklab(62.52% 0.0041 -0.1753)
OKLCH	oklch(62.52% 0.175 271.3)
XYZ	xyz(28.0762, 23.3570, 85.4500)
Luminance	0.2336 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637CF0 #F0D763

analogous

#63C3F0 #637CF0 #9163F0

triadic

#637CF0 #F0637C #7CF063

tetradic

#637CF0 #F063C3 #F0D763 #63F091

square

#637CF0 #F063C3 #F0D763 #63F091

split-complementary

#637CF0 #F09163 #C3F063

monochromatic

#1333C6 #2B4DEB #637CF0 #9BABF5 #D3DAFB

Accessibility & contrast

On white

3.70

#637CF0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.67

#637CF0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637CF0

5.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637CF0	#FFFFFF	#000000	##000000
##637CF0	1.00	3.70	5.67	5.67
#FFFFFF	3.70	1.00	21.00	21.00
#000000	5.67	21.00	1.00	1.00
##000000	5.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#418BF4

Deuteranopia (green-blind)

#277FEE

Tritanopia (blue-blind)

#0096AB

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #637cf0;
/* rgb */ color: rgb(99, 124, 240);
/* oklch */ color: oklch(62.5% 0.175 271.3);

Tailwind

colors: {
  custom: {
    50: '#9ba1f6',
    500: '#637cf0',
    950: '#000000',
  },
}

SCSS

$custom: #637cf0;
$custom-light: #9ba1f6;
$custom-dark: #000000;

JSON

{
  "hex": "#637cf0",
  "rgb": {
    "r": 99,
    "g": 124,
    "b": 240
  },
  "hsl": {
    "h": 229.362,
    "s": 82.456,
    "l": 66.471
  },
  "oklch": {
    "l": 0.62521,
    "c": 0.17532,
    "h": 271.3
  },
  "luminance": 0.23359
}

Semantic roles & 50–950 ramp

primary

#637CF0

secondary

#EEE6C1

accent

#B907DF

background

#FAF9FF

surface

#F4F2FE

border

#CECCD6

text

#0F0E17

muted

#7F7E85

Preview Lab

Preview with #637CF0

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

Preview Lab → · Contrast checker → · Palette generator →