#666C18#666C18

#666C18 is a mid, moderate yellow. Relative luminance 0.136; OKLCH L 51.0% C 0.104 H 113.6°. Best body text is #FFFFFF at 5.64:1 contrast (WCAG AA passes).

Color values

HEX	#666C18
RGB	rgb(102, 108, 24)
HSL	hsl(64, 64%, 26%)
HSV	hsv(64, 78%, 42%)
CMYK	cmyk(5.6%, 0%, 77.8%, 57.6%)
CIE-LAB	lab(43.68, -13.51, 43.08)
CIE-LCH	lch(43.68, 45.15, 107.42°)
OKLab	oklab(50.98% -0.0416 0.095)
OKLCH	oklch(50.98% 0.104 113.6)
XYZ	xyz(11.0073, 13.6161, 2.9123)
Luminance	0.1362 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666C18 #1E186C

analogous

#6C4818 #666C18 #3C6C18

triadic

#666C18 #18666C #6C1866

tetradic

#666C18 #186C48 #1E186C #6C183C

square

#666C18 #186C48 #1E186C #6C183C

split-complementary

#666C18 #183C6C #48186C

monochromatic

#181906 #373A0D #666C18 #959E23 #C5D02E

Accessibility & contrast

On white

5.64

#666C18 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.72

#666C18 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666C18

5.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666C18	#FFFFFF	#000000	##FFFFFF
##666C18	1.00	5.64	3.72	5.64
#FFFFFF	5.64	1.00	21.00	1.00
#000000	3.72	21.00	1.00	21.00
##FFFFFF	5.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#746606

Deuteranopia (green-blind)

#74681F

Tritanopia (blue-blind)

#6D655C

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #666c18;
/* rgb */ color: rgb(102, 108, 24);
/* oklch */ color: oklch(51.0% 0.104 113.6);

Tailwind

colors: {
  custom: {
    50: '#94955c',
    500: '#666c18',
    950: '#000000',
  },
}

SCSS

$custom: #666c18;
$custom-light: #94955c;
$custom-dark: #000000;

JSON

{
  "hex": "#666c18",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 24
  },
  "hsl": {
    "h": 64.286,
    "s": 63.636,
    "l": 25.882
  },
  "oklch": {
    "l": 0.50983,
    "c": 0.10366,
    "h": 113.6
  },
  "luminance": 0.13616
}

Semantic roles & 50–950 ramp

primary

#666C18

secondary

#453EA2

accent

#41E74D

background

#F9F9F5

surface

#F2F1E9

border

#CCCBC5

text

#0E0D04

muted

#7E7E79

Preview Lab

Preview with #666C18

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

Preview Lab → · Contrast checker → · Palette generator →