#666F18#666F18

#666F18 is a mid, moderate yellow. Relative luminance 0.143; OKLCH L 51.7% C 0.107 H 115.5°. Best body text is #FFFFFF at 5.45:1 contrast (WCAG AA passes).

Color values

HEX	#666F18
RGB	rgb(102, 111, 24)
HSL	hsl(66, 64%, 26%)
HSV	hsv(66, 78%, 44%)
CMYK	cmyk(8.1%, 0%, 78.4%, 56.5%)
CIE-LAB	lab(44.60, -15.15, 43.95)
CIE-LCH	lch(44.60, 46.49, 109.02°)
OKLab	oklab(51.73% -0.0461 0.0968)
OKLCH	oklch(51.73% 0.107 115.5)
XYZ	xyz(11.3291, 14.2598, 3.0196)
Luminance	0.1426 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666F18 #21186F

analogous

#6F4D18 #666F18 #3B6F18

triadic

#666F18 #18666F #6F1866

tetradic

#666F18 #186F4D #21186F #6F183B

square

#666F18 #186F4D #21186F #6F183B

split-complementary

#666F18 #183B6F #4D186F

monochromatic

#171905 #383D0D #666F18 #94A123 #C1D22F

Accessibility & contrast

On white

5.45

#666F18 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.85

#666F18 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666F18

5.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666F18	#FFFFFF	#000000	##FFFFFF
##666F18	1.00	5.45	3.85	5.45
#FFFFFF	5.45	1.00	21.00	1.00
#000000	3.85	21.00	1.00	21.00
##FFFFFF	5.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#776905

Deuteranopia (green-blind)

#776A20

Tritanopia (blue-blind)

#6D685F

Achromatopsia (no color)

#696969

Design tokens & code

CSS

--color: #666f18;
/* rgb */ color: rgb(102, 111, 24);
/* oklch */ color: oklch(51.7% 0.107 115.5);

Tailwind

colors: {
  custom: {
    50: '#94985d',
    500: '#666f18',
    950: '#000000',
  },
}

SCSS

$custom: #666f18;
$custom-light: #94985d;
$custom-dark: #000000;

JSON

{
  "hex": "#666f18",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 24
  },
  "hsl": {
    "h": 66.207,
    "s": 64.444,
    "l": 26.471
  },
  "oklch": {
    "l": 0.51725,
    "c": 0.10723,
    "h": 115.5
  },
  "luminance": 0.1426
}

Semantic roles & 50–950 ramp

primary

#666F18

secondary

#493EA5

accent

#40E752

background

#F9F9F5

surface

#F2F2E9

border

#CCCCC5

text

#0E0D04

muted

#7E7E79

Preview Lab

Preview with #666F18

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

Preview Lab → · Contrast checker → · Palette generator →