#647B80#647B80

#647B80 is a mid, muted cyan. Relative luminance 0.184; OKLCH L 56.6% C 0.028 H 212.4°. Best body text is #000000 at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#647B80
RGB	rgb(100, 123, 128)
HSL	hsl(191, 12%, 45%)
HSV	hsv(191, 22%, 50%)
CMYK	cmyk(21.9%, 3.9%, 0%, 49.8%)
CIE-LAB	lab(50.02, -7.14, -5.50)
CIE-LCH	lch(50.02, 9.01, 217.58°)
OKLab	oklab(56.64% -0.0236 -0.0149)
OKLCH	oklch(56.64% 0.028 212.4)
XYZ	xyz(16.2337, 18.4332, 23.1205)
Luminance	0.1843 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#647B80 #806964

analogous

#648077 #647B80 #646D80

triadic

#647B80 #80647B #7B8064

tetradic

#647B80 #776480 #806964 #6D8064

square

#647B80 #776480 #806964 #6D8064

split-complementary

#647B80 #80646D #807764

monochromatic

#2E393B #495A5E #647B80 #83999E #A5B6B9

Accessibility & contrast

On white

4.48

#647B80 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.69

#647B80 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #647B80

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##647B80	#FFFFFF	#000000	##000000
##647B80	1.00	4.48	4.69	4.69
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.69	21.00	1.00	1.00
##000000	4.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#777980

Deuteranopia (green-blind)

#727580

Tritanopia (blue-blind)

#5C7D7C

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #647b80;
/* rgb */ color: rgb(100, 123, 128);
/* oklch */ color: oklch(56.6% 0.028 212.4);

Tailwind

colors: {
  custom: {
    50: '#90a1a4',
    500: '#647b80',
    950: '#000000',
  },
}

SCSS

$custom: #647b80;
$custom-light: #90a1a4;
$custom-dark: #000000;

JSON

{
  "hex": "#647b80",
  "rgb": {
    "r": 100,
    "g": 123,
    "b": 128
  },
  "hsl": {
    "h": 190.714,
    "s": 12.281,
    "l": 44.706
  },
  "oklch": {
    "l": 0.56638,
    "c": 0.02788,
    "h": 212.4
  },
  "luminance": 0.18434
}

Semantic roles & 50–950 ramp

primary

#647B80

secondary

#A89B98

accent

#7F73B5

background

#F8F9FA

surface

#F0F2F4

border

#CBCCCE

text

#0C0E0F

muted

#7D7E7F

Preview Lab

Preview with #647B80

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

Preview Lab → · Contrast checker → · Palette generator →