#637CD2#637CD2

#637CD2 is a mid, vivid blue. Relative luminance 0.217; OKLCH L 60.7% C 0.134 H 269.8°. Best body text is #000000 at 5.34:1 contrast (WCAG AA passes).

Color values

HEX	#637CD2
RGB	rgb(99, 124, 210)
HSL	hsl(226, 55%, 61%)
HSV	hsv(226, 53%, 82%)
CMYK	cmyk(52.9%, 41%, 0%, 17.6%)
CIE-LAB	lab(53.73, 15.40, -47.22)
CIE-LCH	lch(53.73, 49.66, 288.06°)
OKLab	oklab(60.66% -0.0004 -0.1339)
OKLCH	oklch(60.66% 0.134 269.8)
XYZ	xyz(23.9823, 21.7194, 63.8888)
Luminance	0.2172 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637CD2 #D2B963

analogous

#63B4D2 #637CD2 #8163D2

triadic

#637CD2 #D2637C #7CD263

tetradic

#637CD2 #D263B4 #D2B963 #63D281

square

#637CD2 #D263B4 #D2B963 #63D281

split-complementary

#637CD2 #D28163 #B4D263

monochromatic

#2A4191 #3756C0 #637CD2 #92A4E0 #C2CCED

Accessibility & contrast

On white

3.93

#637CD2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.34

#637CD2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637CD2

5.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637CD2	#FFFFFF	#000000	##000000
##637CD2	1.00	3.93	5.34	5.34
#FFFFFF	3.93	1.00	21.00	21.00
#000000	5.34	21.00	1.00	1.00
##000000	5.34	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5986D5

Deuteranopia (green-blind)

#4C7CD0

Tritanopia (blue-blind)

#2D8F9D

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #637cd2;
/* rgb */ color: rgb(99, 124, 210);
/* oklch */ color: oklch(60.7% 0.134 269.8);

Tailwind

colors: {
  custom: {
    50: '#96a1e0',
    500: '#637cd2',
    950: '#000000',
  },
}

SCSS

$custom: #637cd2;
$custom-light: #96a1e0;
$custom-dark: #000000;

JSON

{
  "hex": "#637cd2",
  "rgb": {
    "r": 99,
    "g": 124,
    "b": 210
  },
  "hsl": {
    "h": 226.486,
    "s": 55.224,
    "l": 60.588
  },
  "oklch": {
    "l": 0.60663,
    "c": 0.1339,
    "h": 269.8
  },
  "luminance": 0.21721
}

Semantic roles & 50–950 ramp

primary

#637CD2

secondary

#DED4B3

accent

#9F23C3

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0E15

muted

#7E7E83

Preview Lab

Preview with #637CD2

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

Preview Lab → · Contrast checker → · Palette generator →