#663333 Color

#663333 is rgb(102, 51, 51) in RGB, hsl(0, 33%, 30%) in HSL, and about cmyk(0%, 50%, 50%, 60%) in CMYK. It has no registered color name of its own — the closest is Garnet (#733635), clearly related but distinguishable side by side at ΔE 5.74. White text is the more readable choice on this background.

#663333

HEX#663333

RGBrgb(102, 51, 51)

HSLhsl(0, 33%, 30%)

HSVhsv(0, 50%, 40%)

CMYKcmyk(0%, 50%, 50%, 60%)

OKLCHoklch(38.7% 0.073 21)

LABlab(28.19% 23.34 10.91)

LCHlch(28.19% 25.76 25.05)

What #663333 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 #663333, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Garnet#733635ΔE 5.74 Merlot#73343AΔE 6.04 Roast Coffee#704241ΔE 6.34 Catawba#703642ΔE 7.48 Puce Red#722F37ΔE 7.52 Bole#79443BΔE 8.72

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

#663333 Channel Values

How #663333 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 51 · B 51	8-bit channels as sent to the display
HSL	H 0° · S 33% · L 30%	Easiest model for building lighter and darker variants
HSV	H 0° · S 50% · V 40%	Matches the picker in most design tools
CMYK	C 0% · M 50% · Y 50% · K 60%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	10.07:1 vs white · 2.09:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #663333 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 text10.07:1AA normal AA large AAA normal

Fails AABlack text2.09:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #663333 in the contrast checker.

Colors That Go With #663333

Pairings derived from color-wheel relationships. The complementary color sits opposite #663333; 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 #663333

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 #663333.

How #663333 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#663333

Protanopia#3F3F33

Protanomaly#513B33

Deuteranopia#494931

Deuteranomaly#564132

Tritanopia#663333

Tritanomaly#663333

Achromatopsia#424242

Test a full palette in the color blindness simulator.

Using #663333 in Code

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

CSS custom property--color-663333: #663333;

CSS backgroundbackground-color: #663333;

Tailwind configcolors: { 'color-663333': '#663333' }

SwiftUIColor(red: 0.400, green: 0.200, blue: 0.200)

Android XML<color name="color_663333">#663333</color>

SVG fillfill="#663333"

More Red Colors

#663333 sits in the red family. These are its neighbours across that family's full range, each with its own breakdown.

670a1c 660000 674c47 651a1a 690c0c 645452 692020 610000 6b1000 603939 6c2e1f 5e1916 841b2d 9e0000 b57281 c83f49 da8686 e7968b f5d6d6 fe2712 ff4040 ff9999 ffdbe1 3d1010

#663333 Frequently Asked Questions

What color is #663333?

#663333 is a dark red — rgb(102, 51, 51) in RGB and hsl(0, 33%, 30%) in HSL. It carries no registered color name of its own; the closest named color is Garnet (#733635), which is clearly related but distinguishable side by side at a CIE76 distance of 5.74.

What is the RGB value of #663333?

#663333 is rgb(102, 51, 51) — red 102, green 51, and blue 51 on the 0-255 scale.

What is the CMYK value of #663333?

#663333 converts to approximately cmyk(0%, 50%, 50%, 60%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #663333 be black or white?

White text is the more readable choice. #663333 scores 10.07:1 against white and 2.09:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #663333 as a CSS color keyword?

No. #663333 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 dimgray (#696969) at a CIE76 distance of 30.44, which is a different colour altogether.

Open #663333 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 red in the color library, the guide to shades of red, or the full color library.