#666D10#666D10

#666D10 is a mid, moderate yellow. Relative luminance 0.138; OKLCH L 51.2% C 0.109 H 114.2°. Best body text is #FFFFFF at 5.59:1 contrast (WCAG AA passes).

Color values

HEX	#666D10
RGB	rgb(102, 109, 16)
HSL	hsl(65, 74%, 25%)
HSV	hsv(65, 85%, 43%)
CMYK	cmyk(6.4%, 0%, 85.3%, 57.3%)
CIE-LAB	lab(43.94, -14.41, 45.97)
CIE-LCH	lch(43.94, 48.17, 107.40°)
OKLab	oklab(51.18% -0.0447 0.0996)
OKLCH	oklch(51.18% 0.109 114.2)
XYZ	xyz(11.0420, 13.7997, 2.5720)
Luminance	0.1380 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666D10 #17106D

analogous

#6D4610 #666D10 #386D10

triadic

#666D10 #10666D #6D1066

tetradic

#666D10 #106D46 #17106D #6D1038

square

#666D10 #106D46 #17106D #6D1038

split-complementary

#666D10 #10386D #46106D

monochromatic

#191B04 #343808 #666D10 #98A218 #CAD820

Accessibility & contrast

On white

5.59

#666D10 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.76

#666D10 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666D10

5.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666D10	#FFFFFF	#000000	##FFFFFF
##666D10	1.00	5.59	3.76	5.59
#FFFFFF	5.59	1.00	21.00	1.00
#000000	3.76	21.00	1.00	21.00
##FFFFFF	5.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#766700

Deuteranopia (green-blind)

#756919

Tritanopia (blue-blind)

#6D665C

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #666d10;
/* rgb */ color: rgb(102, 109, 16);
/* oklch */ color: oklch(51.2% 0.109 114.2);

Tailwind

colors: {
  custom: {
    50: '#959659',
    500: '#666d10',
    950: '#000000',
  },
}

SCSS

$custom: #666d10;
$custom-light: #959659;
$custom-dark: #000000;

JSON

{
  "hex": "#666d10",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 16
  },
  "hsl": {
    "h": 64.516,
    "s": 74.4,
    "l": 24.51
  },
  "oklch": {
    "l": 0.51184,
    "c": 0.10915,
    "h": 114.2
  },
  "luminance": 0.13799
}

Semantic roles & 50–950 ramp

primary

#666D10

secondary

#3C34A5

accent

#37F145

background

#F9F9F5

surface

#F2F2E9

border

#CCCCC5

text

#0E0D04

muted

#7E7E79

Preview Lab

Preview with #666D10

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

Preview Lab → · Contrast checker → · Palette generator →