#637CD1#637CD1

#637CD1 is a mid, vivid blue. Relative luminance 0.217; OKLCH L 60.6% C 0.132 H 269.8°. Best body text is #000000 at 5.33:1 contrast (WCAG AA passes).

Color values

HEX	#637CD1
RGB	rgb(99, 124, 209)
HSL	hsl(226, 54%, 60%)
HSV	hsv(226, 53%, 82%)
CMYK	cmyk(52.6%, 40.7%, 0%, 18%)
CIE-LAB	lab(53.67, 15.08, -46.73)
CIE-LCH	lch(53.67, 49.11, 287.89°)
OKLab	oklab(60.61% -0.0005 -0.1325)
OKLCH	oklch(60.61% 0.132 269.8)
XYZ	xyz(23.8581, 21.6698, 63.2347)
Luminance	0.2167 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637CD1 #D1B863

analogous

#63B3D1 #637CD1 #8163D1

triadic

#637CD1 #D1637C #7CD163

tetradic

#637CD1 #D163B3 #D1B863 #63D181

square

#637CD1 #D163B3 #D1B863 #63D181

split-complementary

#637CD1 #D18163 #B3D163

monochromatic

#2A418F #3857BF #637CD1 #92A4DF #C2CBED

Accessibility & contrast

On white

3.94

#637CD1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.33

#637CD1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637CD1

5.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637CD1	#FFFFFF	#000000	##000000
##637CD1	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)

#5985D4

Deuteranopia (green-blind)

#4D7CCF

Tritanopia (blue-blind)

#2E8E9C

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #637cd1;
/* rgb */ color: rgb(99, 124, 209);
/* oklch */ color: oklch(60.6% 0.132 269.8);

Tailwind

colors: {
  custom: {
    50: '#96a1df',
    500: '#637cd1',
    950: '#000000',
  },
}

SCSS

$custom: #637cd1;
$custom-light: #96a1df;
$custom-dark: #000000;

JSON

{
  "hex": "#637cd1",
  "rgb": {
    "r": 99,
    "g": 124,
    "b": 209
  },
  "hsl": {
    "h": 226.364,
    "s": 54.455,
    "l": 60.392
  },
  "oklch": {
    "l": 0.60605,
    "c": 0.13249,
    "h": 269.8
  },
  "luminance": 0.21671
}

Semantic roles & 50–950 ramp

primary

#637CD1

secondary

#DDD3B3

accent

#9E24C2

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0E15

muted

#7E7E83

Preview Lab

Preview with #637CD1

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

Preview Lab → · Contrast checker → · Palette generator →