#637FA7#637FA7

#637FA7 is a mid, moderate blue. Relative luminance 0.206; OKLCH L 59.1% C 0.070 H 257.3°. Best body text is #000000 at 5.12:1 contrast (WCAG AA passes).

Color values

HEX	#637FA7
RGB	rgb(99, 127, 167)
HSL	hsl(215, 28%, 52%)
HSV	hsv(215, 41%, 65%)
CMYK	cmyk(40.7%, 24%, 0%, 34.5%)
CIE-LAB	lab(52.53, 0.55, -24.47)
CIE-LCH	lch(52.53, 24.48, 271.28°)
OKLab	oklab(59.07% -0.0153 -0.068)
OKLCH	oklch(59.07% 0.07 257.3)
XYZ	xyz(19.7078, 20.6203, 39.4934)
Luminance	0.2062 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637FA7 #A78B63

analogous

#63A1A7 #637FA7 #6963A7

triadic

#637FA7 #A7637F #7FA763

tetradic

#637FA7 #A763A1 #A78B63 #63A769

square

#637FA7 #A763A1 #A78B63 #63A769

split-complementary

#637FA7 #A76963 #A1A763

monochromatic

#34445C #4A6183 #637FA7 #8A9FBD #B1BFD3

Accessibility & contrast

On white

4.10

#637FA7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.12

#637FA7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637FA7

5.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637FA7	#FFFFFF	#000000	##000000
##637FA7	1.00	4.10	5.12	5.12
#FFFFFF	4.10	1.00	21.00	21.00
#000000	5.12	21.00	1.00	1.00
##000000	5.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7081A9

Deuteranopia (green-blind)

#697AA6

Tritanopia (blue-blind)

#4B888D

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #637fa7;
/* rgb */ color: rgb(99, 127, 167);
/* oklch */ color: oklch(59.1% 0.070 257.3);

Tailwind

colors: {
  custom: {
    50: '#92a4c1',
    500: '#637fa7',
    950: '#000000',
  },
}

SCSS

$custom: #637fa7;
$custom-light: #92a4c1;
$custom-dark: #000000;

JSON

{
  "hex": "#637fa7",
  "rgb": {
    "r": 99,
    "g": 127,
    "b": 167
  },
  "hsl": {
    "h": 215.294,
    "s": 27.869,
    "l": 52.157
  },
  "oklch": {
    "l": 0.59069,
    "c": 0.0697,
    "h": 257.3
  },
  "luminance": 0.20621
}

Semantic roles & 50–950 ramp

primary

#637FA7

secondary

#C2B6A4

accent

#9C64C4

background

#F9FAFB

surface

#F1F3F7

border

#CBCDD0

text

#0D0F12

muted

#7E7F81

Preview Lab

Preview with #637FA7

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

Preview Lab → · Contrast checker → · Palette generator →