#666B40#666B40

#666B40 is a mid, moderate yellow. Relative luminance 0.137; OKLCH L 51.2% C 0.063 H 114.1°. Best body text is #FFFFFF at 5.61:1 contrast (WCAG AA passes).

Color values

HEX	#666B40
RGB	rgb(102, 107, 64)
HSL	hsl(67, 25%, 34%)
HSV	hsv(67, 40%, 42%)
CMYK	cmyk(4.7%, 0%, 40.2%, 58%)
CIE-LAB	lab(43.81, -9.36, 23.46)
CIE-LCH	lch(43.81, 25.26, 111.75°)
OKLab	oklab(51.24% -0.0256 0.0575)
OKLCH	oklch(51.24% 0.063 114.1)
XYZ	xyz(11.6627, 13.7105, 6.8815)
Luminance	0.1371 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666B40 #45406B

analogous

#6B5A40 #666B40 #506B40

triadic

#666B40 #40666B #6B4066

tetradic

#666B40 #406B5A #45406B #6B4050

square

#666B40 #406B5A #45406B #6B4050

split-complementary

#666B40 #40506B #5A406B

monochromatic

#1D1E12 #414529 #666B40 #8B9157 #A8AE77

Accessibility & contrast

On white

5.61

#666B40 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.74

#666B40 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666B40

5.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666B40	#FFFFFF	#000000	##FFFFFF
##666B40	1.00	5.61	3.74	5.61
#FFFFFF	5.61	1.00	21.00	1.00
#000000	3.74	21.00	1.00	21.00
##FFFFFF	5.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#71673D

Deuteranopia (green-blind)

#716842

Tritanopia (blue-blind)

#6B6660

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #666b40;
/* rgb */ color: rgb(102, 107, 64);
/* oklch */ color: oklch(51.2% 0.063 114.1);

Tailwind

colors: {
  custom: {
    50: '#929575',
    500: '#666b40',
    950: '#000000',
  },
}

SCSS

$custom: #666b40;
$custom-light: #929575;
$custom-dark: #000000;

JSON

{
  "hex": "#666b40",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 64
  },
  "hsl": {
    "h": 66.977,
    "s": 25.146,
    "l": 33.529
  },
  "oklch": {
    "l": 0.51236,
    "c": 0.06292,
    "h": 114.1
  },
  "luminance": 0.1371
}

Semantic roles & 50–950 ramp

primary

#666B40

secondary

#736E99

accent

#66C271

background

#F9F9F7

surface

#F1F1ED

border

#CBCBC8

text

#0D0D08

muted

#7E7E7B

Preview Lab

Preview with #666B40

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

Preview Lab → · Contrast checker → · Palette generator →