#637DAA#637DAA

#637DAA is a mid, moderate blue. Relative luminance 0.202; OKLCH L 58.8% C 0.076 H 261.1°. Best body text is #000000 at 5.04:1 contrast (WCAG AA passes).

Color values

HEX	#637DAA
RGB	rgb(99, 125, 170)
HSL	hsl(218, 29%, 53%)
HSV	hsv(218, 42%, 67%)
CMYK	cmyk(41.8%, 26.5%, 0%, 33.3%)
CIE-LAB	lab(52.09, 2.59, -26.90)
CIE-LCH	lch(52.09, 27.02, 275.50°)
OKLab	oklab(58.76% -0.0117 -0.0749)
OKLCH	oklch(58.76% 0.076 261.1)
XYZ	xyz(19.7326, 20.2211, 40.8857)
Luminance	0.2022 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637DAA #AA9063

analogous

#63A1AA #637DAA #6C63AA

triadic

#637DAA #AA637D #7DAA63

tetradic

#637DAA #AA63A1 #AA9063 #63AA6C

square

#637DAA #AA63A1 #AA9063 #63AA6C

split-complementary

#637DAA #AA6C63 #A1AA63

monochromatic

#34445F #496087 #637DAA #8B9EC0 #B2BFD5

Accessibility & contrast

On white

4.16

#637DAA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.04

#637DAA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637DAA

5.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637DAA	#FFFFFF	#000000	##000000
##637DAA	1.00	4.16	5.04	5.04
#FFFFFF	4.16	1.00	21.00	21.00
#000000	5.04	21.00	1.00	1.00
##000000	5.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D80AC

Deuteranopia (green-blind)

#6579A9

Tritanopia (blue-blind)

#4A878D

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #637daa;
/* rgb */ color: rgb(99, 125, 170);
/* oklch */ color: oklch(58.8% 0.076 261.1);

Tailwind

colors: {
  custom: {
    50: '#92a2c3',
    500: '#637daa',
    950: '#000000',
  },
}

SCSS

$custom: #637daa;
$custom-light: #92a2c3;
$custom-dark: #000000;

JSON

{
  "hex": "#637daa",
  "rgb": {
    "r": 99,
    "g": 125,
    "b": 170
  },
  "hsl": {
    "h": 218.028,
    "s": 29.461,
    "l": 52.745
  },
  "oklch": {
    "l": 0.58762,
    "c": 0.07583,
    "h": 261.1
  },
  "luminance": 0.20222
}

Semantic roles & 50–950 ramp

primary

#637DAA

secondary

#C4B9A5

accent

#A162C6

background

#F9F9FC

surface

#F1F2F8

border

#CBCCD1

text

#0D0F12

muted

#7E7E81

Preview Lab

Preview with #637DAA

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

Preview Lab → · Contrast checker → · Palette generator →