#637CD7#637CD7

#637CD7 is a mid, vivid blue. Relative luminance 0.220; OKLCH L 61.0% C 0.141 H 270.2°. Best body text is #000000 at 5.39:1 contrast (WCAG AA passes).

Color values

HEX	#637CD7
RGB	rgb(99, 124, 215)
HSL	hsl(227, 59%, 62%)
HSV	hsv(227, 54%, 84%)
CMYK	cmyk(54%, 42.3%, 0%, 15.7%)
CIE-LAB	lab(54.00, 16.99, -49.61)
CIE-LCH	lch(54.00, 52.44, 288.91°)
OKLab	oklab(60.96% 0.0006 -0.1409)
OKLCH	oklch(60.96% 0.141 270.2)
XYZ	xyz(24.6150, 21.9725, 67.2208)
Luminance	0.2197 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637CD7 #D7BE63

analogous

#63B6D7 #637CD7 #8463D7

triadic

#637CD7 #D7637C #7CD763

tetradic

#637CD7 #D763B6 #D7BE63 #63D784

square

#637CD7 #D763B6 #D7BE63 #63D784

split-complementary

#637CD7 #D78463 #B6D763

monochromatic

#274098 #3454C9 #637CD7 #94A5E3 #C4CEF0

Accessibility & contrast

On white

3.89

#637CD7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.39

#637CD7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637CD7

5.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637CD7	#FFFFFF	#000000	##000000
##637CD7	1.00	3.89	5.39	5.39
#FFFFFF	3.89	1.00	21.00	21.00
#000000	5.39	21.00	1.00	1.00
##000000	5.39	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5586DA

Deuteranopia (green-blind)

#487CD5

Tritanopia (blue-blind)

#26909F

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #637cd7;
/* rgb */ color: rgb(99, 124, 215);
/* oklch */ color: oklch(61.0% 0.141 270.2);

Tailwind

colors: {
  custom: {
    50: '#97a1e4',
    500: '#637cd7',
    950: '#000000',
  },
}

SCSS

$custom: #637cd7;
$custom-light: #97a1e4;
$custom-dark: #000000;

JSON

{
  "hex": "#637cd7",
  "rgb": {
    "r": 99,
    "g": 124,
    "b": 215
  },
  "hsl": {
    "h": 227.069,
    "s": 59.184,
    "l": 61.569
  },
  "oklch": {
    "l": 0.60958,
    "c": 0.14092,
    "h": 270.2
  },
  "luminance": 0.21974
}

Semantic roles & 50–950 ramp

primary

#637CD7

secondary

#E0D7B5

accent

#A31FC7

background

#F9F9FE

surface

#F2F2FC

border

#CCCCD5

text

#0E0E15

muted

#7E7E84

Preview Lab

Preview with #637CD7

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

Preview Lab → · Contrast checker → · Palette generator →