#551D91 Color
#551D91 is rgb(85, 29, 145) in RGB, hsl(269, 67%, 34%) in HSL, and about cmyk(41%, 80%, 0%, 43%) in CMYK. It has no registered color name of its own — the closest is Indigo (#4B0082), clearly related but distinguishable side by side at ΔE 7.15. White text is the more readable choice on this background.
#551D91rgb(85, 29, 145)hsl(269, 67%, 34%)hsv(269, 80%, 57%)cmyk(41%, 80%, 0%, 43%)oklch(38.7% 0.175 299.9)lab(25.62% 43.01 -53.90)lch(25.62% 68.96 308.58)What #551D91 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 #551D91, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.
Browse the full index of named colors A-Z or every purple in the library.
#551D91 Channel Values
How #551D91 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 85 · G 29 · B 145 | 8-bit channels as sent to the display |
| HSL | H 269° · S 67% · L 34% | Easiest model for building lighter and darker variants |
| HSV | H 269° · S 80% · V 57% | Matches the picker in most design tools |
| CMYK | C 41% · M 80% · Y 0% · K 43% | Approximate ink mix; confirm with an ICC profile before printing |
| Luminance | 10.66:1 vs white · 1.97:1 vs black | WCAG 2.2 relative-luminance contrast ratios |
Text Contrast & Accessibility
WCAG 2.2 contrast ratios for text on a #551D91 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.
Need a specific ratio against another background? Open #551D91 in the contrast checker.
Colors That Go With #551D91
Pairings derived from color-wheel relationships. The complementary color sits opposite #551D91; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.
Tints & Shades of #551D91
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.
Want a full 50-950 ramp with semantic roles? Generate design tokens from #551D91.
How #551D91 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.
#551D91#2C2C91#402791#373790#452F91#433D3D#4B3369#3E3E3EUsing #551D91 in Code
Copy-ready declarations for the places this color usually ends up.
--color-551d91: #551D91;background-color: #551D91;colors: { 'color-551d91': '#551D91' }Color(red: 0.333, green: 0.114, blue: 0.569)<color name="color_551d91">#551D91</color>fill="#551D91"More Purple Colors
#551D91 sits in the purple family. These are its neighbours across that family's full range, each with its own breakdown.
#551D91 Frequently Asked Questions
What color is #551D91?
#551D91 is a dark purple — rgb(85, 29, 145) in RGB and hsl(269, 67%, 34%) in HSL. It carries no registered color name of its own; the closest named color is Indigo (#4B0082), which is clearly related but distinguishable side by side at a CIE76 distance of 7.15.
What is the RGB value of #551D91?
#551D91 is rgb(85, 29, 145) — red 85, green 29, and blue 145 on the 0-255 scale.
What is the CMYK value of #551D91?
#551D91 converts to approximately cmyk(41%, 80%, 0%, 43%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.
Should text on #551D91 be black or white?
White text is the more readable choice. #551D91 scores 10.66:1 against white and 1.97:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.
Can I write #551D91 as a CSS color keyword?
No. #551D91 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 7.15, which is clearly related but distinguishable side by side.
Open #551D91 in a Tool
Keep exploring: every purple in the color library, the guide to shades of purple, or the full color library.