#637FC0#637FC0

#637FC0 is a mid, moderate blue. Relative luminance 0.216; OKLCH L 60.3% C 0.105 H 265.6°. Best body text is #000000 at 5.33:1 contrast (WCAG AA passes).

Color values

HEX	#637FC0
RGB	rgb(99, 127, 192)
HSL	hsl(222, 42%, 57%)
HSV	hsv(222, 48%, 75%)
CMYK	cmyk(48.4%, 33.9%, 0%, 24.7%)
CIE-LAB	lab(53.64, 7.97, -37.12)
CIE-LCH	lch(53.64, 37.97, 282.12°)
OKLab	oklab(60.3% -0.0079 -0.1044)
OKLCH	oklch(60.3% 0.105 265.6)
XYZ	xyz(22.2463, 21.6357, 52.8628)
Luminance	0.2164 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637FC0 #C0A463

analogous

#63AEC0 #637FC0 #7563C0

triadic

#637FC0 #C0637F #7FC063

tetradic

#637FC0 #C063AE #C0A463 #63C075

square

#637FC0 #C063AE #C0A463 #63C075

split-complementary

#637FC0 #C07563 #AEC063

monochromatic

#314678 #425FA4 #637FC0 #8FA3D2 #BAC7E3

Accessibility & contrast

On white

3.94

#637FC0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.33

#637FC0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637FC0

5.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637FC0	#FFFFFF	#000000	##000000
##637FC0	1.00	3.94	5.33	5.33
#FFFFFF	3.94	1.00	21.00	21.00
#000000	5.33	21.00	1.00	1.00
##000000	5.33	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6785C3

Deuteranopia (green-blind)

#5D7CBF

Tritanopia (blue-blind)

#3D8D97

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #637fc0;
/* rgb */ color: rgb(99, 127, 192);
/* oklch */ color: oklch(60.3% 0.105 265.6);

Tailwind

colors: {
  custom: {
    50: '#94a3d3',
    500: '#637fc0',
    950: '#000000',
  },
}

SCSS

$custom: #637fc0;
$custom-light: #94a3d3;
$custom-dark: #000000;

JSON

{
  "hex": "#637fc0",
  "rgb": {
    "r": 99,
    "g": 127,
    "b": 192
  },
  "hsl": {
    "h": 221.935,
    "s": 42.466,
    "l": 57.059
  },
  "oklch": {
    "l": 0.60297,
    "c": 0.10474,
    "h": 265.6
  },
  "luminance": 0.21637
}

Semantic roles & 50–950 ramp

primary

#637FC0

secondary

#D2C7AC

accent

#AD56D2

background

#F9FAFD

surface

#F2F3FA

border

#CCCDD3

text

#0E0F14

muted

#7E7F83

Preview Lab

Preview with #637FC0

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

Preview Lab → · Contrast checker → · Palette generator →