#637EC0#637EC0

#637EC0 is a mid, moderate blue. Relative luminance 0.214; OKLCH L 60.1% C 0.106 H 266.4°. Best body text is #000000 at 5.28:1 contrast (WCAG AA passes).

Color values

HEX	#637EC0
RGB	rgb(99, 126, 192)
HSL	hsl(223, 42%, 57%)
HSV	hsv(223, 48%, 75%)
CMYK	cmyk(48.4%, 34.4%, 0%, 24.7%)
CIE-LAB	lab(53.36, 8.57, -37.56)
CIE-LCH	lch(53.36, 38.52, 282.85°)
OKLab	oklab(60.08% -0.0067 -0.1057)
OKLCH	oklch(60.08% 0.106 266.4)
XYZ	xyz(22.1178, 21.3787, 52.8200)
Luminance	0.2138 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637EC0 #C0A563

analogous

#63ACC0 #637EC0 #7763C0

triadic

#637EC0 #C0637E #7EC063

tetradic

#637EC0 #C063AC #C0A563 #63C077

square

#637EC0 #C063AC #C0A563 #63C077

split-complementary

#637EC0 #C07763 #ACC063

monochromatic

#314578 #425EA4 #637EC0 #8FA2D2 #BAC6E3

Accessibility & contrast

On white

3.98

#637EC0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.28

#637EC0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637EC0

5.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637EC0	#FFFFFF	#000000	##000000
##637EC0	1.00	3.98	5.28	5.28
#FFFFFF	3.98	1.00	21.00	21.00
#000000	5.28	21.00	1.00	1.00
##000000	5.28	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6584C3

Deuteranopia (green-blind)

#5B7CBF

Tritanopia (blue-blind)

#3D8C96

Achromatopsia (no color)

#7F7F7F

Design tokens & code

CSS

--color: #637ec0;
/* rgb */ color: rgb(99, 126, 192);
/* oklch */ color: oklch(60.1% 0.106 266.4);

Tailwind

colors: {
  custom: {
    50: '#94a3d3',
    500: '#637ec0',
    950: '#000000',
  },
}

SCSS

$custom: #637ec0;
$custom-light: #94a3d3;
$custom-dark: #000000;

JSON

{
  "hex": "#637ec0",
  "rgb": {
    "r": 99,
    "g": 126,
    "b": 192
  },
  "hsl": {
    "h": 222.581,
    "s": 42.466,
    "l": 57.059
  },
  "oklch": {
    "l": 0.60082,
    "c": 0.10592,
    "h": 266.4
  },
  "luminance": 0.2138
}

Semantic roles & 50–950 ramp

primary

#637EC0

secondary

#D2C7AC

accent

#AE56D2

background

#F9FAFD

surface

#F2F3FA

border

#CCCDD3

text

#0E0F14

muted

#7E7F83

Preview Lab

Preview with #637EC0

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

Preview Lab → · Contrast checker → · Palette generator →