#5B1D8B Color
#5B1D8B is rgb(91, 29, 139) in RGB, hsl(274, 65%, 33%) in HSL, and about cmyk(35%, 79%, 0%, 45%) in CMYK. It has no registered color name of its own — the closest is Rebecca Purple (#663399), clearly related but distinguishable side by side at ΔE 8.05. White text is the more readable choice on this background.
#5B1D8Brgb(91, 29, 139)hsl(274, 65%, 33%)hsv(274, 79%, 55%)cmyk(35%, 79%, 0%, 45%)oklch(38.9% 0.17 305.1)lab(26.08% 43.13 -49.39)lch(26.08% 65.57 311.13)What #5B1D8B 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 #5B1D8B, 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.
#5B1D8B Channel Values
How #5B1D8B 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 91 · G 29 · B 139 | 8-bit channels as sent to the display |
| HSL | H 274° · S 65% · L 33% | Easiest model for building lighter and darker variants |
| HSV | H 274° · S 79% · V 55% | Matches the picker in most design tools |
| CMYK | C 35% · M 79% · Y 0% · K 45% | Approximate ink mix; confirm with an ICC profile before printing |
| Luminance | 10.53:1 vs white · 1.99:1 vs black | WCAG 2.2 relative-luminance contrast ratios |
Text Contrast & Accessibility
WCAG 2.2 contrast ratios for text on a #5B1D8B 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 #5B1D8B in the contrast checker.
Colors That Go With #5B1D8B
Pairings derived from color-wheel relationships. The complementary color sits opposite #5B1D8B; 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 #5B1D8B
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 #5B1D8B.
How #5B1D8B 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.
#5B1D8B#2F2F8B#45298B#3A3A8A#49318B#4D3B3B#533165#3F3F3FUsing #5B1D8B in Code
Copy-ready declarations for the places this color usually ends up.
--color-5b1d8b: #5B1D8B;background-color: #5B1D8B;colors: { 'color-5b1d8b': '#5B1D8B' }Color(red: 0.357, green: 0.114, blue: 0.545)<color name="color_5b1d8b">#5B1D8B</color>fill="#5B1D8B"More Purple Colors
#5B1D8B sits in the purple family. These are its neighbours across that family's full range, each with its own breakdown.
#5B1D8B Frequently Asked Questions
What color is #5B1D8B?
#5B1D8B is a dark purple — rgb(91, 29, 139) in RGB and hsl(274, 65%, 33%) in HSL. It carries no registered color name of its own; the closest named color is Rebecca Purple (#663399), which is clearly related but distinguishable side by side at a CIE76 distance of 8.05.
What is the RGB value of #5B1D8B?
#5B1D8B is rgb(91, 29, 139) — red 91, green 29, and blue 139 on the 0-255 scale.
What is the CMYK value of #5B1D8B?
#5B1D8B converts to approximately cmyk(35%, 79%, 0%, 45%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.
Should text on #5B1D8B be black or white?
White text is the more readable choice. #5B1D8B 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 #5B1D8B as a CSS color keyword?
No. #5B1D8B 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 8.05, which is clearly related but distinguishable side by side.
Open #5B1D8B in a Tool
Keep exploring: every purple in the color library, the guide to shades of purple, or the full color library.