#666D18#666D18

#666D18 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	#666D18
RGB	rgb(102, 109, 24)
HSL	hsl(65, 64%, 26%)
HSV	hsv(65, 78%, 43%)
CMYK	cmyk(6.4%, 0%, 78%, 57.3%)
CIE-LAB	lab(43.99, -14.06, 43.37)
CIE-LCH	lch(43.99, 45.59, 107.97°)
OKLab	oklab(51.23% -0.0431 0.0956)
OKLCH	oklch(51.23% 0.105 114.3)
XYZ	xyz(11.1133, 13.8282, 2.9477)
Luminance	0.1383 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666D18 #1F186D

analogous

#6D4918 #666D18 #3B6D18

triadic

#666D18 #18666D #6D1866

tetradic

#666D18 #186D49 #1F186D #6D183B

square

#666D18 #186D49 #1F186D #6D183B

split-complementary

#666D18 #183B6D #49186D

monochromatic

#171906 #373B0D #666D18 #959F23 #C4D12E

Accessibility & contrast

On white

5.58

#666D18 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.77

#666D18 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666D18

5.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666D18	#FFFFFF	#000000	##FFFFFF
##666D18	1.00	5.58	3.77	5.58
#FFFFFF	5.58	1.00	21.00	1.00
#000000	3.77	21.00	1.00	21.00
##FFFFFF	5.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#756706

Deuteranopia (green-blind)

#75691F

Tritanopia (blue-blind)

#6D665D

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #666d18;
/* rgb */ color: rgb(102, 109, 24);
/* oklch */ color: oklch(51.2% 0.105 114.3);

Tailwind

colors: {
  custom: {
    50: '#94965c',
    500: '#666d18',
    950: '#000000',
  },
}

SCSS

$custom: #666d18;
$custom-light: #94965c;
$custom-dark: #000000;

JSON

{
  "hex": "#666d18",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 24
  },
  "hsl": {
    "h": 64.941,
    "s": 63.91,
    "l": 26.078
  },
  "oklch": {
    "l": 0.5123,
    "c": 0.10485,
    "h": 114.3
  },
  "luminance": 0.13828
}

Semantic roles & 50–950 ramp

primary

#666D18

secondary

#463EA3

accent

#41E74F

background

#F9F9F5

surface

#F2F2E9

border

#CCCCC5

text

#0E0D04

muted

#7E7E79

Preview Lab

Preview with #666D18

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

Preview Lab → · Contrast checker → · Palette generator →