#637DCD#637DCD

#637DCD is a mid, vivid blue. Relative luminance 0.217; OKLCH L 60.6% C 0.126 H 268.9°. Best body text is #000000 at 5.35:1 contrast (WCAG AA passes).

Color values

HEX	#637DCD
RGB	rgb(99, 125, 205)
HSL	hsl(225, 51%, 60%)
HSV	hsv(225, 52%, 80%)
CMYK	cmyk(51.7%, 39%, 0%, 19.6%)
CIE-LAB	lab(53.74, 13.21, -44.37)
CIE-LCH	lch(53.74, 46.30, 286.58°)
OKLab	oklab(60.58% -0.0025 -0.1256)
OKLCH	oklch(60.58% 0.126 268.9)
XYZ	xyz(23.4950, 21.7261, 60.7013)
Luminance	0.2173 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637DCD #CDB363

analogous

#63B2CD #637DCD #7E63CD

triadic

#637DCD #CD637D #7DCD63

tetradic

#637DCD #CD63B2 #CDB363 #63CD7E

square

#637DCD #CD63B2 #CDB363 #63CD7E

split-complementary

#637DCD #CD7E63 #B2CD63

monochromatic

#2C438A #3B5AB8 #637DCD #91A4DC #C0CAEB

Accessibility & contrast

On white

3.93

#637DCD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.35

#637DCD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637DCD

5.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637DCD	#FFFFFF	#000000	##000000
##637DCD	1.00	3.93	5.35	5.35
#FFFFFF	3.93	1.00	21.00	21.00
#000000	5.35	21.00	1.00	1.00
##000000	5.35	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D85D0

Deuteranopia (green-blind)

#517CCB

Tritanopia (blue-blind)

#328E9B

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #637dcd;
/* rgb */ color: rgb(99, 125, 205);
/* oklch */ color: oklch(60.6% 0.126 268.9);

Tailwind

colors: {
  custom: {
    50: '#96a2dc',
    500: '#637dcd',
    950: '#000000',
  },
}

SCSS

$custom: #637dcd;
$custom-light: #96a2dc;
$custom-dark: #000000;

JSON

{
  "hex": "#637dcd",
  "rgb": {
    "r": 99,
    "g": 125,
    "b": 205
  },
  "hsl": {
    "h": 225.283,
    "s": 51.456,
    "l": 59.608
  },
  "oklch": {
    "l": 0.60583,
    "c": 0.1256,
    "h": 268.9
  },
  "luminance": 0.21728
}

Semantic roles & 50–950 ramp

primary

#637DCD

secondary

#DAD0B1

accent

#B84DDB

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0F15

muted

#7E7E83

Preview Lab

Preview with #637DCD

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

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