#637A7B#637A7B

#637A7B is a mid, muted teal. Relative luminance 0.180; OKLCH L 56.2% C 0.027 H 199.7°. Best body text is #000000 at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#637A7B
RGB	rgb(99, 122, 123)
HSL	hsl(183, 11%, 44%)
HSV	hsv(183, 20%, 48%)
CMYK	cmyk(19.5%, 0.8%, 0%, 51.8%)
CIE-LAB	lab(49.50, -8.10, -3.33)
CIE-LCH	lch(49.50, 8.75, 202.33°)
OKLab	oklab(56.16% -0.0253 -0.0091)
OKLCH	oklch(56.16% 0.027 199.7)
XYZ	xyz(15.6793, 18.0013, 21.3835)
Luminance	0.1800 (WCAG relative)
Temperature	neutral
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637A7B #7B6463

analogous

#637B70 #637A7B #636E7B

triadic

#637A7B #7B637A #7A7B63

tetradic

#637A7B #70637B #7B6463 #6E7B63

square

#637A7B #70637B #7B6463 #6E7B63

split-complementary

#637A7B #7B636E #7B7063

monochromatic

#2C3737 #485859 #637A7B #81999A #A3B4B5

Accessibility & contrast

On white

4.56

#637A7B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.60

#637A7B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637A7B

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637A7B	#FFFFFF	#000000	##000000
##637A7B	1.00	4.56	4.60	4.60
#FFFFFF	4.56	1.00	21.00	21.00
#000000	4.60	21.00	1.00	1.00
##000000	4.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#77787B

Deuteranopia (green-blind)

#72747B

Tritanopia (blue-blind)

#5C7C7A

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #637a7b;
/* rgb */ color: rgb(99, 122, 123);
/* oklch */ color: oklch(56.2% 0.027 199.7);

Tailwind

colors: {
  custom: {
    50: '#90a0a1',
    500: '#637a7b',
    950: '#000000',
  },
}

SCSS

$custom: #637a7b;
$custom-light: #90a0a1;
$custom-dark: #000000;

JSON

{
  "hex": "#637a7b",
  "rgb": {
    "r": 99,
    "g": 122,
    "b": 123
  },
  "hsl": {
    "h": 182.5,
    "s": 10.811,
    "l": 43.529
  },
  "oklch": {
    "l": 0.56157,
    "c": 0.02687,
    "h": 199.7
  },
  "luminance": 0.18002
}

Semantic roles & 50–950 ramp

primary

#637A7B

secondary

#A49695

accent

#7774B4

background

#F8F9F9

surface

#F0F2F2

border

#CBCCCC

text

#0C0E0E

muted

#7D7E7E

Preview Lab

Preview with #637A7B

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

Preview Lab → · Contrast checker → · Palette generator →