#666D21#666D21

#666D21 is a mid, moderate yellow. Relative luminance 0.139; OKLCH L 51.3% C 0.098 H 114.4°. Best body text is #FFFFFF at 5.56:1 contrast (WCAG AA passes).

Color values

HEX	#666D21
RGB	rgb(102, 109, 33)
HSL	hsl(66, 54%, 28%)
HSV	hsv(66, 70%, 43%)
CMYK	cmyk(6.4%, 0%, 69.7%, 57.3%)
CIE-LAB	lab(44.05, -13.53, 39.79)
CIE-LCH	lch(44.05, 42.03, 108.79°)
OKLab	oklab(51.3% -0.0407 0.0897)
OKLCH	oklch(51.3% 0.098 114.4)
XYZ	xyz(11.2229, 13.8721, 3.5249)
Luminance	0.1387 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666D21 #28216D

analogous

#6D4E21 #666D21 #406D21

triadic

#666D21 #21666D #6D2166

tetradic

#666D21 #216D4E #28216D #6D2140

square

#666D21 #216D4E #28216D #6D2140

split-complementary

#666D21 #21406D #4E216D

monochromatic

#161707 #3A3E13 #666D21 #929C2F #BAC642

Accessibility & contrast

On white

5.56

#666D21 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.77

#666D21 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666D21

5.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666D21	#FFFFFF	#000000	##FFFFFF
##666D21	1.00	5.56	3.77	5.56
#FFFFFF	5.56	1.00	21.00	1.00
#000000	3.77	21.00	1.00	21.00
##FFFFFF	5.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#756716

Deuteranopia (green-blind)

#756926

Tritanopia (blue-blind)

#6D665E

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #666d21;
/* rgb */ color: rgb(102, 109, 33);
/* oklch */ color: oklch(51.3% 0.098 114.4);

Tailwind

colors: {
  custom: {
    50: '#949661',
    500: '#666d21',
    950: '#000000',
  },
}

SCSS

$custom: #666d21;
$custom-light: #949661;
$custom-dark: #000000;

JSON

{
  "hex": "#666d21",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 33
  },
  "hsl": {
    "h": 65.526,
    "s": 53.521,
    "l": 27.843
  },
  "oklch": {
    "l": 0.51301,
    "c": 0.09848,
    "h": 114.4
  },
  "luminance": 0.13872
}

Semantic roles & 50–950 ramp

primary

#666D21

secondary

#5149A1

accent

#4BDD58

background

#F9F9F5

surface

#F2F2EA

border

#CCCCC6

text

#0D0D05

muted

#7E7E79

Preview Lab

Preview with #666D21

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

Preview Lab → · Contrast checker → · Palette generator →