#637FCD#637FCD

#637FCD is a mid, vivid blue. Relative luminance 0.222; OKLCH L 61.0% C 0.123 H 267.7°. Best body text is #000000 at 5.45:1 contrast (WCAG AA passes).

Color values

HEX	#637FCD
RGB	rgb(99, 127, 205)
HSL	hsl(224, 51%, 60%)
HSV	hsv(224, 52%, 80%)
CMYK	cmyk(51.7%, 38%, 0%, 19.6%)
CIE-LAB	lab(54.28, 12.01, -43.51)
CIE-LCH	lch(54.28, 45.14, 285.43°)
OKLab	oklab(61% -0.0048 -0.123)
OKLCH	oklch(61% 0.123 267.7)
XYZ	xyz(23.7508, 22.2375, 60.7865)
Luminance	0.2224 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637FCD #CDB163

analogous

#63B4CD #637FCD #7C63CD

triadic

#637FCD #CD637F #7FCD63

tetradic

#637FCD #CD63B4 #CDB163 #63CD7C

square

#637FCD #CD63B4 #CDB163 #63CD7C

split-complementary

#637FCD #CD7C63 #B4CD63

monochromatic

#2C458A #3B5CB8 #637FCD #91A5DC #C0CBEB

Accessibility & contrast

On white

3.85

#637FCD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.45

#637FCD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637FCD

5.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637FCD	#FFFFFF	#000000	##000000
##637FCD	1.00	3.85	5.45	5.45
#FFFFFF	3.85	1.00	21.00	21.00
#000000	5.45	21.00	1.00	1.00
##000000	5.45	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6087D0

Deuteranopia (green-blind)

#547DCB

Tritanopia (blue-blind)

#31909C

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #637fcd;
/* rgb */ color: rgb(99, 127, 205);
/* oklch */ color: oklch(61.0% 0.123 267.7);

Tailwind

colors: {
  custom: {
    50: '#96a3dc',
    500: '#637fcd',
    950: '#000000',
  },
}

SCSS

$custom: #637fcd;
$custom-light: #96a3dc;
$custom-dark: #000000;

JSON

{
  "hex": "#637fcd",
  "rgb": {
    "r": 99,
    "g": 127,
    "b": 205
  },
  "hsl": {
    "h": 224.151,
    "s": 51.456,
    "l": 59.608
  },
  "oklch": {
    "l": 0.61002,
    "c": 0.12315,
    "h": 267.7
  },
  "luminance": 0.22239
}

Semantic roles & 50–950 ramp

primary

#637FCD

secondary

#DAD0B1

accent

#B54DDB

background

#F9FAFD

surface

#F2F3FB

border

#CCCDD4

text

#0E0F15

muted

#7E7F83

Preview Lab

Preview with #637FCD

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

Preview Lab → · Contrast checker → · Palette generator →