#647C81#647C81

#647C81 is a mid, muted cyan. Relative luminance 0.187; OKLCH L 56.9% C 0.029 H 211.7°. Best body text is #000000 at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#647C81
RGB	rgb(100, 124, 129)
HSL	hsl(190, 13%, 45%)
HSV	hsv(190, 22%, 51%)
CMYK	cmyk(22.5%, 3.9%, 0%, 49.4%)
CIE-LAB	lab(50.34, -7.47, -5.60)
CIE-LCH	lch(50.34, 9.34, 216.84°)
OKLab	oklab(56.91% -0.0246 -0.0152)
OKLCH	oklch(56.91% 0.029 211.7)
XYZ	xyz(16.4245, 18.7090, 23.5104)
Luminance	0.1871 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#647C81 #816964

analogous

#648178 #647C81 #646D81

triadic

#647C81 #81647C #7C8164

tetradic

#647C81 #786481 #816964 #6D8164

square

#647C81 #786481 #816964 #6D8164

split-complementary

#647C81 #81646D #817864

monochromatic

#2F3A3C #495B5F #647C81 #839A9F #A6B6BA

Accessibility & contrast

On white

4.43

#647C81 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.74

#647C81 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #647C81

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##647C81	#FFFFFF	#000000	##000000
##647C81	1.00	4.43	4.74	4.74
#FFFFFF	4.43	1.00	21.00	21.00
#000000	4.74	21.00	1.00	1.00
##000000	4.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#787A81

Deuteranopia (green-blind)

#737681

Tritanopia (blue-blind)

#5B7E7D

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #647c81;
/* rgb */ color: rgb(100, 124, 129);
/* oklch */ color: oklch(56.9% 0.029 211.7);

Tailwind

colors: {
  custom: {
    50: '#90a1a5',
    500: '#647c81',
    950: '#000000',
  },
}

SCSS

$custom: #647c81;
$custom-light: #90a1a5;
$custom-dark: #000000;

JSON

{
  "hex": "#647c81",
  "rgb": {
    "r": 100,
    "g": 124,
    "b": 129
  },
  "hsl": {
    "h": 190.345,
    "s": 12.664,
    "l": 44.902
  },
  "oklch": {
    "l": 0.56908,
    "c": 0.0289,
    "h": 211.7
  },
  "luminance": 0.1871
}

Semantic roles & 50–950 ramp

primary

#647C81

secondary

#A99B98

accent

#7E72B6

background

#F8F9FA

surface

#F0F2F4

border

#CBCCCE

text

#0C0F0F

muted

#7D7E7F

Preview Lab

Preview with #647C81

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

Preview Lab → · Contrast checker → · Palette generator →