#666E3A Color

#666E3A is rgb(102, 110, 58) in RGB, hsl(69, 31%, 33%) in HSL, and about cmyk(7%, 0%, 47%, 57%) in CMYK. It has no registered color name of its own — the closest is Mustard Green (#6E6E30), clearly related but distinguishable side by side at ΔE 6.81. White text is the more readable choice on this background.

#666E3A

HEX#666E3A

RGBrgb(102, 110, 58)

HSLhsl(69, 31%, 33%)

HSVhsv(69, 47%, 43%)

CMYKcmyk(7%, 0%, 47%, 57%)

OKLCHoklch(51.9% 0.075 116.3)

LABlab(44.79% -9.61 27.74)

LCHlch(44.79% 29.36 109.11)

What #666E3A Is Called

Most hex codes have no name: there are 16.7 million of them and a few thousand registered names. These are the named colors nearest to #666E3A, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Mustard Green#6E6E30ΔE 6.81 Fatigue Green#5B6238ΔE 6.85 Dark Olive Green#556B2FΔE 7.65 Dark Moss Green#4A5D23ΔE 9.86 Army Green#4B5320ΔE 11.12 Antique Bronze#665D1EΔE 12.27

Browse the full index of named colors A-Z or every green in the library.

#666E3A Channel Values

How #666E3A breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

Model	Channels	Notes
RGB	R 102 · G 110 · B 58	8-bit channels as sent to the display
HSL	H 69° · S 31% · L 33%	Easiest model for building lighter and darker variants
HSV	H 69° · S 47% · V 43%	Matches the picker in most design tools
CMYK	C 7% · M 0% · Y 47% · K 57%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	5.45:1 vs white · 3.86:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #666E3A background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Contrast is one check, not a full accessibility review.

TextWhite text5.45:1AA normal AA large AAA normal

Fails AABlack text3.86:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #666E3A in the contrast checker.

Colors That Go With #666E3A

Pairings derived from color-wheel relationships. The complementary color sits opposite #666E3A; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base

Complementary

Analogous

Analogous

Triadic

Triadic

Split comp.

Split comp.

Tints & Shades of #666E3A

Lighter tints and darker shades built by moving the lightness channel while holding hue and saturation, which is what you want for hover states, backgrounds, and text variants.

Tints

Shades

Want a full 50-950 ramp with semantic roles? Generate design tokens from #666E3A.

How #666E3A Looks with Color Vision Deficiency

Simulated with the Viénot, Brettel & Mollon LMS projection model. Anomalous types are rendered as partial versions of the matching dichromacy, which is an approximation rather than a per-person clinical model.

Typical#666E3A

Protanopia#6D6D3A

Protanomaly#6A6D3A

Deuteranopia#6B6B3A

Deuteranomaly#696C3A

Tritanopia#6B6969

Tritanomaly#696B5A

Achromatopsia#6A6A6A

Test a full palette in the color blindness simulator.

Using #666E3A in Code

Copy-ready declarations for the places this color usually ends up.

CSS custom property--color-666e3a: #666E3A;

CSS backgroundbackground-color: #666E3A;

Tailwind configcolors: { 'color-666e3a': '#666E3A' }

SwiftUIColor(red: 0.400, green: 0.431, blue: 0.227)

Android XML<color name="color_666e3a">#666E3A</color>

SVG fillfill="#666E3A"

More Green Colors

#666E3A sits in the green family. These are its neighbours across that family's full range, each with its own breakdown.

000200 fdfff5 001f00 f7fee7 002400 f7fbf5 002c22 f5fffa 002e00 f5fff5 003300 f0fff0 008000 00db87 0d542b 20483f 33cc66 46c399 5ea500 728639 91e0b7 a3f5d8 bcd7bc d1ffed

#666E3A Frequently Asked Questions

What color is #666E3A?

#666E3A is a dark green — rgb(102, 110, 58) in RGB and hsl(69, 31%, 33%) in HSL. It carries no registered color name of its own; the closest named color is Mustard Green (#6E6E30), which is clearly related but distinguishable side by side at a CIE76 distance of 6.81.

What is the RGB value of #666E3A?

#666E3A is rgb(102, 110, 58) — red 102, green 110, and blue 58 on the 0-255 scale.

What is the CMYK value of #666E3A?

#666E3A converts to approximately cmyk(7%, 0%, 47%, 57%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #666E3A be black or white?

White text is the more readable choice. #666E3A scores 5.45:1 against white and 3.86:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #666E3A as a CSS color keyword?

No. #666E3A is not one of the CSS color keywords, so it has to be written as a hex, rgb() or hsl() value. The closest keyword is darkolivegreen (#556B2F) at a CIE76 distance of 7.65, which is clearly related but distinguishable side by side.

Open #666E3A in a Tool

Hex to RGB Hex to HSL Hex to CMYK Hex to OKLCH Hex to Pantone Build a palette Make a gradient

Keep exploring: every green in the color library, the guide to shades of green, or the full color library.