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X11 named colors

Slateblue1

slateblue1 · #836FFF

HEX

#836FFF

RGB

rgb(131, 111, 255)

CMYK

cmyk(49%, 56%, 0%, 0%)

HSL

hsl(248, 100%, 72%)

LAB

lab(55.5, 43.6, -69.4)

What is Slateblue1?

Slateblue1 is the slateblue1 reference in the X11 named colors. Its sRGB value is #836FFF (rgb 131, 111, 255). It sits in the blue family. Historical X Window System color names — the numbered 1-4 lightness variants of the classic xorg-server rgb.txt palette. See disclaimer for accuracy and trademark notes.

Accessibility

WCAG 2.1 contrast checks for Slateblue1 as a background.

Black text on this color

Sample text · 5.68 : 1
AA Normal
AA Large
AAA Normal
AAA Large

White text on this color

Sample text · 3.70 : 1
AA Normal
AA Large
AAA Normal
AAA Large

Shades, tints & tonal scale of Slateblue1

An 11-step tonal scale derived from Slateblue1 (#836FFF). Click any swatch to copy its HEX. Use these as a starting point for design tokens, hover states, and disabled states in a design system.

Copied #F5F3FF

50

#F5F3FF

#F5F3FF

Copied #EBE8FF

100

#EBE8FF

#EBE8FF

Copied #D7D1FF

200

#D7D1FF

#D7D1FF

Copied #C1B7FF

300

#C1B7FF

#C1B7FF

Copied #A293FF

400

#A293FF

#A293FF

Copied #836FFF

500

#836FFF

#836FFF

Copied #6F5ED9

600

#6F5ED9

#6F5ED9

Copied #5548A6

700

#5548A6

#5548A6

Copied #3B3273

800

#3B3273

#3B3273

Copied #211C40

900

#211C40

#211C40

Copied #100D1F

950

#100D1F

#100D1F

Lighter tints (mixed with white)

Copied #9E91FF

15%

#9E91FF

Copied #B4ACFF

30%

#B4ACFF

Copied #C8C2FF

45%

#C8C2FF

Copied #D9D5FF

60%

#D9D5FF

Copied #E8E6FF

75%

#E8E6FF

Darker shades (mixed with black)

Copied #7A67ED

15%

#7A67ED

Copied #6F5EDA

30%

#6F5EDA

Copied #6353C4

45%

#6353C4

Copied #5547AA

60%

#5547AA

Copied #433889

75%

#433889

Color harmonies for Slateblue1

Classic color-theory harmonies derived from rotating the hue of Slateblue1. Use these to build accent palettes, brand systems, and accessible UI color pairings.

Complementary

180° opposite — strongest contrast

Copied #836FFF

#836FFF

#836FFF

Copied #ECFF70

#ECFF70

#ECFF70

Triadic

Three colors 120° apart

Copied #836FFF

#836FFF

#836FFF

Copied #FF8370

#FF8370

#FF8370

Copied #70FF83

#70FF83

#70FF83

Analogous

Two neighbors ±30° on the wheel

Copied #70A5FF

#70A5FF

#70A5FF

Copied #836FFF

#836FFF

#836FFF

Copied #CB70FF

#CB70FF

#CB70FF

Split-complementary

Base + two colors flanking its complement

Copied #836FFF

#836FFF

#836FFF

Copied #FFCB70

#FFCB70

#FFCB70

Copied #A5FF70

#A5FF70

#A5FF70

Tetradic

Two complementary pairs

Copied #836FFF

#836FFF

#836FFF

Copied #FF70EC

#FF70EC

#FF70EC

Copied #ECFF70

#ECFF70

#ECFF70

Copied #70FF83

#70FF83

#70FF83

Square

Four colors evenly spaced 90° apart

Copied #836FFF

#836FFF

#836FFF

Copied #FF70A5

#FF70A5

#FF70A5

Copied #ECFF70

#ECFF70

#ECFF70

Copied #70FFCB

#70FFCB

#70FFCB

Slateblue1 in every color space

Full conversion of Slateblue1 across the color spaces designers and developers actually use — including OKLCH (the perceptually-uniform space that powers Tailwind v4 and CSS Color Module Level 4) and HWB.

HEX

#836FFF

RGB

rgb(131, 111, 255)

CMYK

cmyk(49%, 56%, 0%, 0%)

HSL

hsl(248, 100%, 72%)

HSV

hsv(248, 56%, 100%)

HWB

hwb(248 44% 0%)

CIE Lab

lab(55.5 43.6 -69.4)

OKLCH

oklch(63.4% 0.206 285.3)

XYZ (D65)

xyz(33.09, 23.41, 97.36)

Copy-ready code for Slateblue1

Drop-in snippets for CSS, Tailwind, Sass, iOS Swift, and Android XML. Click the copy button on any snippet to put it on your clipboard.

CSS

color: #836FFF;
background-color: #836FFF;

CSS variable

:root {
  --color-slateblue1: #836FFF;
}

Tailwind config

// tailwind.config.js
colors: {
  'slateblue1': '#836FFF',
}

Sass

$color-slateblue1: #836FFF;

Swift UIColor

UIColor(red: 0.514, green: 0.435, blue: 1.000, alpha: 1.0)

Android XML

<color name="slateblue1">#836FFF</color>

Closest match in every color system

The nearest Slateblue1 equivalent in every other color system on this site, ranked by ΔE2000 perceptual distance. Useful when translating between design-system, web-standard, and industrial color references.

Closest in X11 named colors

Top 6 ΔE2000-closest entries within the same collection.

Top 6 ΔE2000-closest Pantone references. Cross-system matching is approximate — see disclaimer.

Top 6 ΔE2000-closest RAL Classic references for industrial coating cross-reference.

Copied #7E8B92

RAL 7000

#7E8B92

Squirrel grey

Copied #606E8C

RAL 5014

#606E8C

Pigeon blue

Copied #8F999F

RAL 7001

#8F999F

Silver grey

Copied #49678D

RAL 5023

#49678D

Distant blue

Copied #3B83BD

RAL 5012

#3B83BD

Light blue

Copied #2271B3

RAL 5015

#2271B3

Sky blue

FAQ about Slateblue1

What is the HEX code for Slateblue1?

Slateblue1 (slateblue1) has the HEX code #836FFF. In RGB it is rgb(131, 111, 255), and in CMYK it is cmyk(49%, 56%, 0%, 0%).

What is the OKLCH value of Slateblue1?

Slateblue1 converts to oklch(0.634 0.206 285.3). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.

Is Slateblue1 accessible for body text?

Used as a background, Slateblue1 has a contrast ratio of 5.68:1 with black text and 3.70:1 with white text. WCAG 2.1 AA requires 4.5:1 for normal text. The current recommendation is to use black text and verify in real UI context.

What is the closest Pantone to Slateblue1?

The closest Pantone reference to Slateblue1 by ΔE2000 perceptual distance is Pantone 814 C (#9A66BF). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.

What is the closest RAL color to Slateblue1?

The closest RAL Classic reference to Slateblue1 by ΔE2000 distance is RAL 7000 (Squirrel grey, #7E8B92). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.

What is the complementary color of Slateblue1?

The complementary color (180° opposite on the HSL color wheel) of Slateblue1 is #ECFF70. Use it for high-contrast accents, error states, or call-to-action pairings.

Data provenance & source

X11 named colors (xorg rgb.txt)

The historical X11 color name list shipped in the xorg-server rgb.txt file. Roughly 550 entries covering classic computing color names like 'PapayaWhip', 'MediumAquamarine', and 'DarkSlateGray'. Many CSS named colors originate here. Use as a reference for legacy and creative color names. Most modern CSS implementations accept these names directly.

Source type
derived
Confidence
high
License
MIT/X11 license (X Consortium)
Last reviewed
2026-05-24

Workflow tags

x11
named-color
legacy
blue

X11 colors are sRGB digital values from a 1980s color system. For print, convert to a process-appropriate color and proof against substrate.

X11 named colors · Slateblue1 — #836FFF | PantoneTools