#666B18#666B18

#666B18 is a mid, moderate yellow. Relative luminance 0.134; OKLCH L 50.7% C 0.102 H 113.0°. Best body text is #FFFFFF at 5.70:1 contrast (WCAG AA passes).

Color values

HEX	#666B18
RGB	rgb(102, 107, 24)
HSL	hsl(64, 63%, 26%)
HSV	hsv(64, 78%, 42%)
CMYK	cmyk(4.7%, 0%, 77.6%, 58%)
CIE-LAB	lab(43.37, -12.96, 42.79)
CIE-LCH	lch(43.37, 44.71, 106.85°)
OKLab	oklab(50.74% -0.04 0.0944)
OKLCH	oklch(50.74% 0.103 113)
XYZ	xyz(10.9024, 13.4064, 2.8773)
Luminance	0.1341 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666B18 #1D186B

analogous

#6B4618 #666B18 #3C6B18

triadic

#666B18 #18666B #6B1866

tetradic

#666B18 #186B46 #1D186B #6B183C

square

#666B18 #186B46 #1D186B #6B183C

split-complementary

#666B18 #183C6B #46186B

monochromatic

#181906 #36390D #666B18 #969D23 #C5CF2E

Accessibility & contrast

On white

5.70

#666B18 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.68

#666B18 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666B18

5.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666B18	#FFFFFF	#000000	##FFFFFF
##666B18	1.00	5.70	3.68	5.70
#FFFFFF	5.70	1.00	21.00	1.00
#000000	3.68	21.00	1.00	21.00
##FFFFFF	5.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#746607

Deuteranopia (green-blind)

#74671F

Tritanopia (blue-blind)

#6D645B

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #666b18;
/* rgb */ color: rgb(102, 107, 24);
/* oklch */ color: oklch(50.7% 0.102 113.0);

Tailwind

colors: {
  custom: {
    50: '#94955c',
    500: '#666b18',
    950: '#000000',
  },
}

SCSS

$custom: #666b18;
$custom-light: #94955c;
$custom-dark: #000000;

JSON

{
  "hex": "#666b18",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 24
  },
  "hsl": {
    "h": 63.614,
    "s": 63.359,
    "l": 25.686
  },
  "oklch": {
    "l": 0.50736,
    "c": 0.1025,
    "h": 113
  },
  "luminance": 0.13406
}

Semantic roles & 50–950 ramp

primary

#666B18

secondary

#443EA1

accent

#41E64B

background

#F9F9F5

surface

#F2F1E9

border

#CCCBC5

text

#0E0D04

muted

#7E7E79

Preview Lab

Preview with #666B18

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

Preview Lab → · Contrast checker → · Palette generator →