#637CD8#637CD8

#637CD8 is a mid, vivid blue. Relative luminance 0.220; OKLCH L 61.0% C 0.142 H 270.3°. Best body text is #000000 at 5.41:1 contrast (WCAG AA passes).

Color values

HEX	#637CD8
RGB	rgb(99, 124, 216)
HSL	hsl(227, 60%, 62%)
HSV	hsv(227, 54%, 85%)
CMYK	cmyk(54.2%, 42.6%, 0%, 15.3%)
CIE-LAB	lab(54.05, 17.31, -50.09)
CIE-LCH	lch(54.05, 53.00, 289.06°)
OKLab	oklab(61.02% 0.0007 -0.1423)
OKLCH	oklch(61.02% 0.142 270.3)
XYZ	xyz(24.7438, 22.0240, 67.8996)
Luminance	0.2203 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637CD8 #D8BF63

analogous

#63B7D8 #637CD8 #8463D8

triadic

#637CD8 #D8637C #7CD863

tetradic

#637CD8 #D863B7 #D8BF63 #63D884

square

#637CD8 #D863B7 #D8BF63 #63D884

split-complementary

#637CD8 #D88463 #B7D863

monochromatic

#273F9A #3353CB #637CD8 #94A5E4 #C5CEF0

Accessibility & contrast

On white

3.89

#637CD8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.41

#637CD8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637CD8

5.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637CD8	#FFFFFF	#000000	##000000
##637CD8	1.00	3.89	5.41	5.41
#FFFFFF	3.89	1.00	21.00	21.00
#000000	5.41	21.00	1.00	1.00
##000000	5.41	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5587DC

Deuteranopia (green-blind)

#477CD6

Tritanopia (blue-blind)

#25909F

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #637cd8;
/* rgb */ color: rgb(99, 124, 216);
/* oklch */ color: oklch(61.0% 0.142 270.3);

Tailwind

colors: {
  custom: {
    50: '#97a1e4',
    500: '#637cd8',
    950: '#000000',
  },
}

SCSS

$custom: #637cd8;
$custom-light: #97a1e4;
$custom-dark: #000000;

JSON

{
  "hex": "#637cd8",
  "rgb": {
    "r": 99,
    "g": 124,
    "b": 216
  },
  "hsl": {
    "h": 227.179,
    "s": 60,
    "l": 61.765
  },
  "oklch": {
    "l": 0.61017,
    "c": 0.14232,
    "h": 270.3
  },
  "luminance": 0.22026
}

Semantic roles & 50–950 ramp

primary

#637CD8

secondary

#E1D8B6

accent

#A31EC8

background

#F9F9FE

surface

#F2F2FC

border

#CCCCD5

text

#0E0E16

muted

#7E7E84

Preview Lab

Preview with #637CD8

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

Preview Lab → · Contrast checker → · Palette generator →