#666D17#666D17

#666D17 is a mid, moderate yellow. Relative luminance 0.138; OKLCH L 51.2% C 0.105 H 114.3°. Best body text is #FFFFFF at 5.58:1 contrast (WCAG AA passes).

Color values

HEX	#666D17
RGB	rgb(102, 109, 23)
HSL	hsl(65, 65%, 26%)
HSV	hsv(65, 79%, 43%)
CMYK	cmyk(6.4%, 0%, 78.9%, 57.3%)
CIE-LAB	lab(43.98, -14.11, 43.73)
CIE-LCH	lch(43.98, 45.95, 107.89°)
OKLab	oklab(51.22% -0.0433 0.0961)
OKLCH	oklch(51.22% 0.105 114.3)
XYZ	xyz(11.1031, 13.8241, 2.8939)
Luminance	0.1382 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666D17 #1E176D

analogous

#6D4917 #666D17 #3B6D17

triadic

#666D17 #17666D #6D1766

tetradic

#666D17 #176D49 #1E176D #6D173B

square

#666D17 #176D49 #1E176D #6D173B

split-complementary

#666D17 #173B6D #49176D

monochromatic

#181905 #373A0C #666D17 #95A022 #C5D22C

Accessibility & contrast

On white

5.58

#666D17 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.76

#666D17 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666D17

5.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666D17	#FFFFFF	#000000	##FFFFFF
##666D17	1.00	5.58	3.76	5.58
#FFFFFF	5.58	1.00	21.00	1.00
#000000	3.76	21.00	1.00	21.00
##FFFFFF	5.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#756704

Deuteranopia (green-blind)

#75691E

Tritanopia (blue-blind)

#6D665D

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #666d17;
/* rgb */ color: rgb(102, 109, 23);
/* oklch */ color: oklch(51.2% 0.105 114.3);

Tailwind

colors: {
  custom: {
    50: '#94965c',
    500: '#666d17',
    950: '#000000',
  },
}

SCSS

$custom: #666d17;
$custom-light: #94965c;
$custom-dark: #000000;

JSON

{
  "hex": "#666d17",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 23
  },
  "hsl": {
    "h": 64.884,
    "s": 65.152,
    "l": 25.882
  },
  "oklch": {
    "l": 0.51223,
    "c": 0.10545,
    "h": 114.3
  },
  "luminance": 0.13824
}

Semantic roles & 50–950 ramp

primary

#666D17

secondary

#453DA3

accent

#40E84D

background

#F9F9F5

surface

#F2F2E9

border

#CCCCC5

text

#0E0D04

muted

#7E7E79

Preview Lab

Preview with #666D17

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

Preview Lab → · Contrast checker → · Palette generator →