#81559B Color

#81559B is rgb(129, 85, 155) in RGB, hsl(278, 29%, 47%) in HSL, and about cmyk(17%, 45%, 0%, 39%) in CMYK. It has no registered color name of its own — the closest is Royal Purple (#7851A9), visibly different at ΔE 10.79. White text is the more readable choice on this background.

#81559B

HEX#81559B

RGBrgb(129, 85, 155)

HSLhsl(278, 29%, 47%)

HSVhsv(278, 45%, 61%)

CMYKcmyk(17%, 45%, 0%, 39%)

OKLCHoklch(52.6% 0.116 311.9)

LABlab(43.34% 28.73 -31.30)

LCHlch(43.34% 42.48 312.55)

What #81559B 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 #81559B, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Royal Purple#7851A9ΔE 10.79 Ultra Violet#5F4B8BΔE 11.35 Middle Blue Purple#8B72BEΔE 12.66 Razzmic Berry#8D4E85ΔE 12.87 Maximum Purple#733380ΔE 13.75 French Lilac#86608EΔE 13.96

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

#81559B Channel Values

How #81559B 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 129 · G 85 · B 155	8-bit channels as sent to the display
HSL	H 278° · S 29% · L 47%	Easiest model for building lighter and darker variants
HSV	H 278° · S 45% · V 61%	Matches the picker in most design tools
CMYK	C 17% · M 45% · Y 0% · K 39%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	5.67:1 vs white · 3.71:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #81559B 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 text5.67:1AA normal AA large AAA normal

Fails AABlack text3.71:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #81559B in the contrast checker.

Colors That Go With #81559B

Pairings derived from color-wheel relationships. The complementary color sits opposite #81559B; 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 #81559B

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 #81559B.

How #81559B 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#81559B

Protanopia#5E5E9B

Protanomaly#6E5B9B

Deuteranopia#66669A

Deuteranomaly#72609B

Tritanopia#786161

Tritanomaly#7C5D7D

Achromatopsia#676767

Test a full palette in the color blindness simulator.

Using #81559B in Code

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

CSS custom property--color-81559b: #81559B;

CSS backgroundbackground-color: #81559B;

Tailwind configcolors: { 'color-81559b': '#81559B' }

SwiftUIColor(red: 0.506, green: 0.333, blue: 0.608)

Android XML<color name="color_81559b">#81559B</color>

SVG fillfill="#81559B"

More Purple Colors

#81559B sits in the purple family. These are its neighbours across that family's full range, each with its own breakdown.

150024 fdf8ff 170b22 fdf4ff 1b0d35 faf5ff 1d0731 fae8ff 1e0033 f6cfff 20002e f3e8ff 300052 402060 541490 6600cc 7008e7 8806ce 9900cc a11fff b19cd9 c27aff cebeef e0b2eb

#81559B Frequently Asked Questions

What color is #81559B?

#81559B is a mid-tone purple — rgb(129, 85, 155) in RGB and hsl(278, 29%, 47%) in HSL. It carries no registered color name of its own; the closest named color is Royal Purple (#7851A9), which is visibly different at a CIE76 distance of 10.79.

What is the RGB value of #81559B?

#81559B is rgb(129, 85, 155) — red 129, green 85, and blue 155 on the 0-255 scale.

What is the CMYK value of #81559B?

#81559B converts to approximately cmyk(17%, 45%, 0%, 39%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #81559B be black or white?

White text is the more readable choice. #81559B scores 5.67:1 against white and 3.71:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #81559B as a CSS color keyword?

No. #81559B 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 darkslateblue (#483D8B) at a CIE76 distance of 18.84, which is visibly different.

Open #81559B in a Tool

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