#646C5A#646C5A

#646C5A is a mid, muted yellow-green. Relative luminance 0.142; OKLCH L 51.9% C 0.029 H 126.9°. Best body text is #FFFFFF at 5.48:1 contrast (WCAG AA passes).

Color values

HEX	#646C5A
RGB	rgb(100, 108, 90)
HSL	hsl(87, 9%, 39%)
HSV	hsv(87, 17%, 42%)
CMYK	cmyk(7.4%, 0%, 16.7%, 57.6%)
CIE-LAB	lab(44.48, -6.67, 9.06)
CIE-LCH	lch(44.48, 11.25, 126.36°)
OKLab	oklab(51.9% -0.0176 0.0234)
OKLCH	oklch(51.9% 0.029 126.9)
XYZ	xyz(12.4633, 14.1726, 11.7499)
Luminance	0.1417 (WCAG relative)
Temperature	neutral
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#646C5A #625A6C

analogous

#6C6B5A #646C5A #5B6C5A

triadic

#646C5A #5A646C #6C5A64

tetradic

#646C5A #5A6C6B #625A6C #6C5A5B

square

#646C5A #5A6C6B #625A6C #6C5A5B

split-complementary

#646C5A #5A5B6C #6B5A6C

monochromatic

#262922 #454B3E #646C5A #838D76 #A1A998

Accessibility & contrast

On white

5.48

#646C5A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.83

#646C5A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #646C5A

5.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##646C5A	#FFFFFF	#000000	##FFFFFF
##646C5A	1.00	5.48	3.83	5.48
#FFFFFF	5.48	1.00	21.00	1.00
#000000	3.83	21.00	1.00	21.00
##FFFFFF	5.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6E6959

Deuteranopia (green-blind)

#6D695B

Tritanopia (blue-blind)

#656A67

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #646c5a;
/* rgb */ color: rgb(100, 108, 90);
/* oklch */ color: oklch(51.9% 0.029 126.9);

Tailwind

colors: {
  custom: {
    50: '#909688',
    500: '#646c5a',
    950: '#000000',
  },
}

SCSS

$custom: #646c5a;
$custom-light: #909688;
$custom-dark: #000000;

JSON

{
  "hex": "#646c5a",
  "rgb": {
    "r": 100,
    "g": 108,
    "b": 90
  },
  "hsl": {
    "h": 86.667,
    "s": 9.091,
    "l": 38.824
  },
  "oklch": {
    "l": 0.51896,
    "c": 0.02923,
    "h": 126.9
  },
  "luminance": 0.14173
}

Semantic roles & 50–950 ramp

primary

#646C5A

secondary

#908A98

accent

#76B291

background

#F8F9F8

surface

#F0F1EF

border

#CBCBCA

text

#0C0D0B

muted

#7D7E7C

Preview Lab

Preview with #646C5A

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

Preview Lab → · Contrast checker → · Palette generator →