#513781 Color

#513781 is rgb(81, 55, 129) in RGB, hsl(261, 40%, 36%) in HSL, and about cmyk(37%, 57%, 0%, 49%) in CMYK. It has no registered color name of its own — the closest is Dark Slate Blue (#483D8B), clearly related but distinguishable side by side at ΔE 5.97. White text is the more readable choice on this background.

#513781

HEX#513781

RGBrgb(81, 55, 129)

HSLhsl(261, 40%, 36%)

HSVhsv(261, 57%, 51%)

CMYKcmyk(37%, 57%, 0%, 49%)

OKLCHoklch(40.5% 0.12 296.9)

LABlab(29.16% 25.22 -38.29)

LCHlch(29.16% 45.85 303.37)

What #513781 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 #513781, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

Dark Slate Blue#483D8BΔE 5.97 Ultra Violet#5F4B8BΔE 10.27 Cyber Grape#58427CΔE 10.54 Spanish Violet#4C2882ΔE 10.9 Eminence#6C3082ΔE 12.75 Imperial#602F6BΔE 13.52

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

#513781 Channel Values

How #513781 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 81 · G 55 · B 129	8-bit channels as sent to the display
HSL	H 261° · S 40% · L 36%	Easiest model for building lighter and darker variants
HSV	H 261° · S 57% · V 51%	Matches the picker in most design tools
CMYK	C 37% · M 57% · Y 0% · K 49%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	9.49:1 vs white · 2.21:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #513781 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 text9.49:1AA normal AA large AAA normal

Fails AABlack text2.21:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #513781 in the contrast checker.

Colors That Go With #513781

Pairings derived from color-wheel relationships. The complementary color sits opposite #513781; 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 #513781

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 #513781.

How #513781 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#513781

Protanopia#3C3C81

Protanomaly#453A81

Deuteranopia#414181

Deuteranomaly#483D81

Tritanopia#454646

Tritanomaly#4A4063

Achromatopsia#464646

Test a full palette in the color blindness simulator.

Using #513781 in Code

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

CSS custom property--color-513781: #513781;

CSS backgroundbackground-color: #513781;

Tailwind configcolors: { 'color-513781': '#513781' }

SwiftUIColor(red: 0.318, green: 0.216, blue: 0.506)

Android XML<color name="color_513781">#513781</color>

SVG fillfill="#513781"

More Purple Colors

#513781 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

#513781 Frequently Asked Questions

What color is #513781?

#513781 is a dark purple — rgb(81, 55, 129) in RGB and hsl(261, 40%, 36%) in HSL. It carries no registered color name of its own; the closest named color is Dark Slate Blue (#483D8B), which is clearly related but distinguishable side by side at a CIE76 distance of 5.97.

What is the RGB value of #513781?

#513781 is rgb(81, 55, 129) — red 81, green 55, and blue 129 on the 0-255 scale.

What is the CMYK value of #513781?

#513781 converts to approximately cmyk(37%, 57%, 0%, 49%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #513781 be black or white?

White text is the more readable choice. #513781 scores 9.49:1 against white and 2.21:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #513781 as a CSS color keyword?

No. #513781 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 5.97, which is clearly related but distinguishable side by side.

Open #513781 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 purple in the color library, the guide to shades of purple, or the full color library.