#647C8B#647C8B

#647C8B is a mid, muted cyan. Relative luminance 0.190; OKLCH L 57.3% C 0.036 H 235.7°. Best body text is #000000 at 4.80:1 contrast (WCAG AA passes).

Color values

HEX	#647C8B
RGB	rgb(100, 124, 139)
HSL	hsl(203, 16%, 47%)
HSV	hsv(203, 28%, 55%)
CMYK	cmyk(28.1%, 10.8%, 0%, 45.5%)
CIE-LAB	lab(50.67, -5.00, -10.98)
CIE-LCH	lch(50.67, 12.07, 245.52°)
OKLab	oklab(57.28% -0.0204 -0.03)
OKLCH	oklch(57.28% 0.036 235.7)
XYZ	xyz(17.1220, 18.9880, 27.1840)
Luminance	0.1899 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#647C8B #8B7364

analogous

#648B87 #647C8B #64698B

triadic

#647C8B #8B647C #7C8B64

tetradic

#647C8B #87648B #8B7364 #698B64

square

#647C8B #87648B #8B7364 #698B64

split-complementary

#647C8B #8B6469 #8B8764

monochromatic

#313C44 #4A5C67 #647C8B #859AA7 #A9B7C1

Accessibility & contrast

On white

4.38

#647C8B on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.80

#647C8B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #647C8B

4.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##647C8B	#FFFFFF	#000000	##000000
##647C8B	1.00	4.38	4.80	4.80
#FFFFFF	4.38	1.00	21.00	21.00
#000000	4.80	21.00	1.00	1.00
##000000	4.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#757B8C

Deuteranopia (green-blind)

#70778B

Tritanopia (blue-blind)

#588081

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #647c8b;
/* rgb */ color: rgb(100, 124, 139);
/* oklch */ color: oklch(57.3% 0.036 235.7);

Tailwind

colors: {
  custom: {
    50: '#91a1ac',
    500: '#647c8b',
    950: '#000000',
  },
}

SCSS

$custom: #647c8b;
$custom-light: #91a1ac;
$custom-dark: #000000;

JSON

{
  "hex": "#647c8b",
  "rgb": {
    "r": 100,
    "g": 124,
    "b": 139
  },
  "hsl": {
    "h": 203.077,
    "s": 16.318,
    "l": 46.863
  },
  "oklch": {
    "l": 0.57276,
    "c": 0.03628,
    "h": 235.7
  },
  "luminance": 0.18989
}

Semantic roles & 50–950 ramp

primary

#647C8B

secondary

#B0A39B

accent

#8B6FB9

background

#F8F9FA

surface

#F0F2F4

border

#CBCCCE

text

#0D0F10

muted

#7D7E7F

Preview Lab

Preview with #647C8B

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

Preview Lab → · Contrast checker → · Palette generator →