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#551D87 Color

#551D87 is rgb(85, 29, 135) in RGB, hsl(272, 65%, 32%) in HSL, and about cmyk(37%, 79%, 0%, 47%) in CMYK. It has no registered color name of its own — the closest is KSU Purple (#512888), clearly related but distinguishable side by side at ΔE 6.29. White text is the more readable choice on this background.

#551D87
HEX#551D87
RGBrgb(85, 29, 135)
HSLhsl(272, 65%, 32%)
HSVhsv(272, 79%, 53%)
CMYKcmyk(37%, 79%, 0%, 47%)
OKLCHoklch(37.8% 0.164 303.1)
LABlab(24.86% 41.04 -48.93)
LCHlch(24.86% 63.86 309.99)

What #551D87 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 #551D87, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

KSU Purple#512888ΔE 6.29Rebecca Purple#663399ΔE 8.07Purple Heart#69359CΔE 8.86Spanish Violet#4C2882ΔE 9.22Indigo#4B0082ΔE 9.53Persian Indigo#32127AΔE 10.34

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

#551D87 Channel Values

How #551D87 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 85 · G 29 · B 1358-bit channels as sent to the display
HSLH 272° · S 65% · L 32%Easiest model for building lighter and darker variants
HSVH 272° · S 79% · V 53%Matches the picker in most design tools
CMYKC 37% · M 79% · Y 0% · K 47%Approximate ink mix; confirm with an ICC profile before printing
Luminance10.98:1 vs white · 1.91:1 vs blackWCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #551D87 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 text10.98:1AA normal AA large AAA normal
Fails AABlack text1.91:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #551D87 in the contrast checker.

Colors That Go With #551D87

Pairings derived from color-wheel relationships. The complementary color sits opposite #551D87; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base
#551D87
Complementary
#4E871D
Analogous
#201D87
Analogous
#871D83
Triadic
#87551D
Triadic
#1D8755
Split comp.
#83871D
Split comp.
#1D8720

Tints & Shades of #551D87

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

#6D25AD
#8731D3
#9D57DB
#B681E4
#CCA7EC
#E4D1F5

Shades

#4A1976
#401565
#351254
#2B0E43
#200B32
#150722

Want a full 50-950 ramp with semantic roles? Generate design tokens from #551D87.

How #551D87 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#551D87
Protanopia#2C2C87
Protanomaly#402787
Deuteranopia#373786
Deuteranomaly#452F87
Tritanopia#463939
Tritanomaly#4D3062
Achromatopsia#3C3C3C

Test a full palette in the color blindness simulator.

Using #551D87 in Code

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

CSS custom property--color-551d87: #551D87;
CSS backgroundbackground-color: #551D87;
Tailwind configcolors: { 'color-551d87': '#551D87' }
SwiftUIColor(red: 0.333, green: 0.114, blue: 0.529)
Android XML<color name="color_551d87">#551D87</color>
SVG fillfill="#551D87"

More Purple Colors

#551D87 sits in the purple family. These are its neighbours across that family's full range, each with its own breakdown.

150024fdf8ff170b22fdf4ff1b0d35faf5ff1d0731fae8ff1e0033f6cfff20002ef3e8ff3000524020605414906600cc7008e78806ce9900cca11fffb19cd9c27affcebeefe0b2eb

#551D87 Frequently Asked Questions

What color is #551D87?

#551D87 is a dark purple — rgb(85, 29, 135) in RGB and hsl(272, 65%, 32%) in HSL. It carries no registered color name of its own; the closest named color is KSU Purple (#512888), which is clearly related but distinguishable side by side at a CIE76 distance of 6.29.

What is the RGB value of #551D87?

#551D87 is rgb(85, 29, 135) — red 85, green 29, and blue 135 on the 0-255 scale.

What is the CMYK value of #551D87?

#551D87 converts to approximately cmyk(37%, 79%, 0%, 47%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #551D87 be black or white?

White text is the more readable choice. #551D87 scores 10.98:1 against white and 1.91:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #551D87 as a CSS color keyword?

No. #551D87 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 rebeccapurple (#663399) at a CIE76 distance of 8.07, which is clearly related but distinguishable side by side.

Open #551D87 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.