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#511B9D Color

#511B9D is rgb(81, 27, 157) in RGB, hsl(265, 71%, 36%) in HSL, and about cmyk(48%, 83%, 0%, 38%) in CMYK. It has no registered color name of its own — the closest is Metallic Violet (#5B0A91), clearly related but distinguishable side by side at ΔE 7.09. White text is the more readable choice on this background.

#511B9D
HEX#511B9D
RGBrgb(81, 27, 157)
HSLhsl(265, 71%, 36%)
HSVhsv(265, 83%, 62%)
CMYKcmyk(48%, 83%, 0%, 38%)
OKLCHoklch(39.1% 0.189 294.5)
LABlab(25.74% 45.47 -61.09)
LCHlch(25.74% 76.15 306.66)

What #511B9D 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 #511B9D, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Metallic Violet#5B0A91ΔE 7.09Indigo#4B0082ΔE 9.23Grape#6F2DA8ΔE 10.06Websafe Indigo#330099ΔE 12.23Persian Indigo#32127AΔE 14.75Phthalo Blue#000F89ΔE 15.11

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

#511B9D Channel Values

How #511B9D breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

ModelChannelsNotes
RGBR 81 · G 27 · B 1578-bit channels as sent to the display
HSLH 265° · S 71% · L 36%Easiest model for building lighter and darker variants
HSVH 265° · S 83% · V 62%Matches the picker in most design tools
CMYKC 48% · M 83% · Y 0% · K 38%Approximate ink mix; confirm with an ICC profile before printing
Luminance10.53:1 vs white · 1.99:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #511B9D 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 text10.53:1AA normal AA large AAA normal
Fails AABlack text1.99:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #511B9D in the contrast checker.

Colors That Go With #511B9D

Pairings derived from color-wheel relationships. The complementary color sits opposite #511B9D; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#511B9D
Complementary
#679D1B
Analogous
#1B259D
Analogous
#921B9D
Triadic
#9D511B
Triadic
#1B9D51
Split comp.
#9D921B
Split comp.
#259D1B

Tints & Shades of #511B9D

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

#6521C4
#7C36DD
#955EE4
#AC81EA
#C6A8F0
#E0CFF7

Shades

#461787
#3D1476
#311060
#280D4E
#1D0A39
#140727

Want a full 50-950 ramp with semantic roles? Generate design tokens from #511B9D.

How #511B9D 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#511B9D
Protanopia#2A2A9D
Protanomaly#3D259D
Deuteranopia#34349D
Deuteranomaly#412C9D
Tritanopia#394141
Tritanomaly#443571
Achromatopsia#3F3F3F

Test a full palette in the color blindness simulator.

Using #511B9D in Code

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

CSS custom property--color-511b9d: #511B9D;
CSS backgroundbackground-color: #511B9D;
Tailwind configcolors: { 'color-511b9d': '#511B9D' }
SwiftUIColor(red: 0.318, green: 0.106, blue: 0.616)
Android XML<color name="color_511b9d">#511B9D</color>
SVG fillfill="#511B9D"

More Purple Colors

#511B9D sits in the purple family. These are its neighbours across that family's full range, each with its own breakdown.

150024fdf8ff170b22fdf4ff1b0d35faf5ff1d0731fae8ff1e0033f6cfff20002ef3e8ff3000524020605414906600cc7008e78806ce9900cca11fffb19cd9c27affcebeefe0b2eb

#511B9D Frequently Asked Questions

What color is #511B9D?

#511B9D is a dark purple — rgb(81, 27, 157) in RGB and hsl(265, 71%, 36%) in HSL. It carries no registered color name of its own; the closest named color is Metallic Violet (#5B0A91), which is clearly related but distinguishable side by side at a CIE76 distance of 7.09.

What is the RGB value of #511B9D?

#511B9D is rgb(81, 27, 157) — red 81, green 27, and blue 157 on the 0-255 scale.

What is the CMYK value of #511B9D?

#511B9D converts to approximately cmyk(48%, 83%, 0%, 38%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #511B9D be black or white?

White text is the more readable choice. #511B9D scores 10.53:1 against white and 1.99:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #511B9D as a CSS color keyword?

No. #511B9D 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 indigo (#4B0082) at a CIE76 distance of 9.23, which is clearly related but distinguishable side by side.

Open #511B9D in a Tool

Hex to RGBHex to HSLHex to CMYKHex to OKLCHHex to PantoneBuild a paletteMake a gradient

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