#637CDA#637CDA

#637CDA is a mid, vivid blue. Relative luminance 0.221; OKLCH L 61.1% C 0.145 H 270.4°. Best body text is #000000 at 5.43:1 contrast (WCAG AA passes).

Color values

HEX	#637CDA
RGB	rgb(99, 124, 218)
HSL	hsl(227, 62%, 62%)
HSV	hsv(227, 55%, 85%)
CMYK	cmyk(54.6%, 43.1%, 0%, 14.5%)
CIE-LAB	lab(54.16, 17.95, -51.04)
CIE-LCH	lch(54.16, 54.11, 289.38°)
OKLab	oklab(61.14% 0.0011 -0.1451)
OKLCH	oklch(61.14% 0.145 270.4)
XYZ	xyz(25.0040, 22.1281, 69.2696)
Luminance	0.2213 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637CDA #DAC163

analogous

#63B8DA #637CDA #8663DA

triadic

#637CDA #DA637C #7CDA63

tetradic

#637CDA #DA63B8 #DAC163 #63DA86

square

#637CDA #DA63B8 #DAC163 #63DA86

split-complementary

#637CDA #DA8663 #B8DA63

monochromatic

#253F9D #3252CE #637CDA #94A6E6 #C6CFF1

Accessibility & contrast

On white

3.87

#637CDA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.43

#637CDA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637CDA

5.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637CDA	#FFFFFF	#000000	##000000
##637CDA	1.00	3.87	5.43	5.43
#FFFFFF	3.87	1.00	21.00	21.00
#000000	5.43	21.00	1.00	1.00
##000000	5.43	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5387DE

Deuteranopia (green-blind)

#457DD8

Tritanopia (blue-blind)

#2291A0

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #637cda;
/* rgb */ color: rgb(99, 124, 218);
/* oklch */ color: oklch(61.1% 0.145 270.4);

Tailwind

colors: {
  custom: {
    50: '#97a1e6',
    500: '#637cda',
    950: '#000000',
  },
}

SCSS

$custom: #637cda;
$custom-light: #97a1e6;
$custom-dark: #000000;

JSON

{
  "hex": "#637cda",
  "rgb": {
    "r": 99,
    "g": 124,
    "b": 218
  },
  "hsl": {
    "h": 227.395,
    "s": 61.658,
    "l": 62.157
  },
  "oklch": {
    "l": 0.61137,
    "c": 0.14511,
    "h": 270.4
  },
  "luminance": 0.2213
}

Semantic roles & 50–950 ramp

primary

#637CDA

secondary

#E2D9B7

accent

#A51CC9

background

#F9F9FE

surface

#F2F2FC

border

#CCCCD5

text

#0E0E16

muted

#7E7E84

Preview Lab

Preview with #637CDA

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

Preview Lab → · Contrast checker → · Palette generator →