#646B59#646B59

#646B59 is a mid, muted yellow-green. Relative luminance 0.139; OKLCH L 51.6% C 0.029 H 124.7°. Best body text is #FFFFFF at 5.54:1 contrast (WCAG AA passes).

Color values

HEX	#646B59
RGB	rgb(100, 107, 89)
HSL	hsl(83, 9%, 38%)
HSV	hsv(83, 17%, 42%)
CMYK	cmyk(6.5%, 0%, 16.8%, 58%)
CIE-LAB	lab(44.16, -6.27, 9.20)
CIE-LCH	lch(44.16, 11.13, 124.30°)
OKLab	oklab(51.63% -0.0164 0.0237)
OKLCH	oklch(51.63% 0.029 124.7)
XYZ	xyz(12.3161, 13.9460, 11.4923)
Luminance	0.1395 (WCAG relative)
Temperature	neutral
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646B59 #60596B

analogous

#6B6959 #646B59 #5B6B59

triadic

#646B59 #59646B #6B5964

tetradic

#646B59 #596B69 #60596B #6B595B

square

#646B59 #596B69 #60596B #6B595B

split-complementary

#646B59 #595B6B #69596B

monochromatic

#262821 #454A3D #646B59 #838C75 #A1A896

Accessibility & contrast

On white

5.54

#646B59 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.79

#646B59 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646B59

5.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646B59	#FFFFFF	#000000	##FFFFFF
##646B59	1.00	5.54	3.79	5.54
#FFFFFF	5.54	1.00	21.00	1.00
#000000	3.79	21.00	1.00	21.00
##FFFFFF	5.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D6958

Deuteranopia (green-blind)

#6C685A

Tritanopia (blue-blind)

#656966

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #646b59;
/* rgb */ color: rgb(100, 107, 89);
/* oklch */ color: oklch(51.6% 0.029 124.7);

Tailwind

colors: {
  custom: {
    50: '#909588',
    500: '#646b59',
    950: '#000000',
  },
}

SCSS

$custom: #646b59;
$custom-light: #909588;
$custom-dark: #000000;

JSON

{
  "hex": "#646b59",
  "rgb": {
    "r": 100,
    "g": 107,
    "b": 89
  },
  "hsl": {
    "h": 83.333,
    "s": 9.184,
    "l": 38.431
  },
  "oklch": {
    "l": 0.51631,
    "c": 0.02885,
    "h": 124.7
  },
  "luminance": 0.13946
}

Semantic roles & 50–950 ramp

primary

#646B59

secondary

#8E8997

accent

#76B28D

background

#F8F9F8

surface

#F0F1EF

border

#CBCBCA

text

#0C0D0B

muted

#7D7E7C

Preview Lab

Preview with #646B59

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

Preview Lab → · Contrast checker → · Palette generator →