Slateblue
slateblue · #6A5ACD
HEX
#6A5ACD
RGB
rgb(106, 90, 205)
CMYK
cmyk(48%, 56%, 0%, 20%)
HSL
hsl(248, 53%, 58%)
LAB
lab(45.3, 36.0, -57.8)
What is Slateblue?
Slateblue is the slateblue reference in the CSS Named Colors. Its sRGB value is #6A5ACD (rgb 106, 90, 205). It sits in the blue family. The 147 named colors defined by the W3C CSS Color Module Level 4 specification — usable directly in CSS as keywords like 'crimson' or 'rebeccapurple'. See disclaimer for accuracy and trademark notes.
Accessibility
WCAG 2.1 contrast checks for Slateblue as a background.
Black text on this color
White text on this color
Shades, tints & tonal scale of Slateblue
An 11-step tonal scale derived from Slateblue (#6A5ACD). 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.
50
#F3F2FB
#F3F2FB
100
#E7E5F7
#E7E5F7
200
#CFCAEF
#CFCAEF
300
#B5ADE6
#B5ADE6
400
#8F83DA
#8F83DA
500
#6A5ACD
#6A5ACD
600
#5A4DAE
#5A4DAE
700
#453B85
#453B85
800
#30295C
#30295C
900
#1B1733
#1B1733
950
#0D0B19
#0D0B19
Lighter tints (mixed with white)
15%
#8E86D6
30%
#AAA4DE
45%
#C0BDE5
60%
#D4D1ED
75%
#E5E4F4
Darker shades (mixed with black)
15%
#6253BF
30%
#594CAF
45%
#50439D
60%
#443987
75%
#352C6D
Color harmonies for Slateblue
Classic color-theory harmonies derived from rotating the hue of Slateblue. Use these to build accent palettes, brand systems, and accessible UI color pairings.
Complementary
180° opposite — strongest contrast
#6A5ACD
#6A5ACD
#BECD5B
#BECD5B
Triadic
Three colors 120° apart
#6A5ACD
#6A5ACD
#CD6A5B
#CD6A5B
#5BCD6A
#5BCD6A
Analogous
Two neighbors ±30° on the wheel
#5B85CD
#5B85CD
#6A5ACD
#6A5ACD
#A35BCD
#A35BCD
Split-complementary
Base + two colors flanking its complement
#6A5ACD
#6A5ACD
#CDA35B
#CDA35B
#85CD5B
#85CD5B
Tetradic
Two complementary pairs
#6A5ACD
#6A5ACD
#CD5BBE
#CD5BBE
#BECD5B
#BECD5B
#5BCD6A
#5BCD6A
Square
Four colors evenly spaced 90° apart
#6A5ACD
#6A5ACD
#CD5B85
#CD5B85
#BECD5B
#BECD5B
#5BCDA3
#5BCDA3
Slateblue in every color space
Full conversion of Slateblue 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
#6A5ACD
RGB
rgb(106, 90, 205)
CMYK
cmyk(48%, 56%, 0%, 20%)
HSL
hsl(248, 53%, 58%)
HSV
hsv(248, 56%, 80%)
HWB
hwb(248 35% 20%)
CIE Lab
lab(45.3 36.0 -57.8)
OKLCH
oklch(54.4% 0.171 285.5)
XYZ (D65)
xyz(20.62, 14.78, 59.51)
Copy-ready code for Slateblue
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: #6A5ACD;
background-color: #6A5ACD;CSS variable
:root {
--color-slateblue: #6A5ACD;
}Tailwind config
// tailwind.config.js
colors: {
'slateblue': '#6A5ACD',
}Sass
$color-slateblue: #6A5ACD;Swift UIColor
UIColor(red: 0.416, green: 0.353, blue: 0.804, alpha: 1.0)Android XML
<color name="slateblue">#6A5ACD</color>Closest match in every color system
The nearest Slateblue 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 CSS Named Colors
Top 6 ΔE2000-closest entries within the same collection.
Closest Pantone matches
Top 6 ΔE2000-closest Pantone references. Cross-system matching is approximate — see disclaimer.
Closest RAL Classic matches
Top 6 ΔE2000-closest RAL Classic references for industrial coating cross-reference.
RAL 5023
#49678D
Distant blue
RAL 5014
#606E8C
Pigeon blue
RAL 5007
#3E5F8A
Brilliant blue
RAL 5000
#354D73
Violet blue
RAL 5019
#1B5583
Capri blue
RAL 5015
#2271B3
Sky blue
FAQ about Slateblue
What is the HEX code for Slateblue?
Slateblue (slateblue) has the HEX code #6A5ACD. In RGB it is rgb(106, 90, 205), and in CMYK it is cmyk(48%, 56%, 0%, 20%).
What is the OKLCH value of Slateblue?
Slateblue converts to oklch(0.544 0.171 285.5). OKLCH is the perceptually uniform color space used by Tailwind v4 and CSS Color Module Level 4.
Is Slateblue accessible for body text?
Used as a background, Slateblue has a contrast ratio of 3.96:1 with black text and 5.31:1 with white text. WCAG 2.1 AA requires 4.5:1 for normal text. The current recommendation is to use white text and verify in real UI context.
What is the closest Pantone to Slateblue?
The closest Pantone reference to Slateblue by ΔE2000 perceptual distance is Pantone 2587 C (#8246AF). Cross-system Pantone matching is approximate; for color-critical print work, verify with a physical Pantone guide.
What is the closest RAL color to Slateblue?
The closest RAL Classic reference to Slateblue by ΔE2000 distance is RAL 5023 (Distant blue, #49678D). RAL is a German industrial coating standard commonly used for paint, powder coat, and architectural specification.
What is the complementary color of Slateblue?
The complementary color (180° opposite on the HSL color wheel) of Slateblue is #BECD5B. Use it for high-contrast accents, error states, or call-to-action pairings.
Data provenance & source
CSS Named Colors (CSS Color Module Level 4)
The 147 named colors defined by the W3C CSS Color Module Level 4 specification. Origin: VGA (16) + X11 (rest) + 'rebeccapurple'. Use as a reference for web color names that all browsers natively support. Names like 'crimson' or 'rebeccapurple' work as CSS values without any framework.
- Source type
- derived
- Confidence
- high
- License
- W3C permissive document license
- Last reviewed
- 2026-05-24
Workflow tags
CSS named colors are sRGB digital values defined for browsers. For print, convert to a process-appropriate color and proof against substrate.