PURPLE

Slate Blue

#6A5ACD

Conversions

HEX#6A5ACD

RGBrgb(106, 90, 205)

HSLhsl(248, 53%, 58%)

HSVhsv(248, 56%, 80%)

CMYKcmyk(48%, 56%, 0%, 20%)

Copy CSS

color: #6a5acd;
/* rgb  */ color: rgb(106, 90, 205);
/* hsl  */ color: hsl(248, 53%, 58%);

Contrast

On whitePass · 5.31 : 1

On ink blackFail · 3.61 : 1

Shades

Tints

Pairings

About Slate Blue

Slate Blue is the hex color #6A5ACD, which translates to rgb(106, 90, 205) in RGB and hsl(248, 53%, 58%) in HSL. On the color wheel it sits at 248 degrees, with a saturation of 53 percent and a lightness of 58 percent. That combination puts Slate Blue in the workable middle of the purple family, neither pastel nor fully saturated.

How Slate Blue compares

Slate Blue is exactly the CSS keyword slateblue, so you can write the keyword instead of the hex and get an identical result. In the Tailwind CSS 4.3.1 palette the nearest token is indigo-400 (#7C86FF), at a distance of 17.2. Inside this library the closest neighbour is Medium Slate Blue at 11.4. Sorted by lightness, Slate Blue is number 15 of the 31 purple colors here.

Text on Slate Blue

One of the five common text colors below clears WCAG AA for normal text on Slate Blue, led by White at 5.31:1. The ratios are computed with the WCAG relative luminance formula, the same one the contrast checker uses, which opens with Slate Blue already loaded as the background.

Contrast of common text colors on Slate Blue. AA normal text needs 4.5:1, AA large text and non-text elements need 3:1, AAA normal text needs 7:1.
Text color	Ratio	AA normal	AA large	AAA normal
White #FFFFFF	5.31:1	Pass	Pass	Fail
Ink black #0F0F12	3.61:1	Fail	Pass	Fail
Mid grey #6B7280	1.10:1	Fail	Fail	Fail
Dark grey #374151	1.94:1	Fail	Fail	Fail
Light grey #E5E7EB	4.29:1	Fail	Pass	Fail

Building a palette around Slate Blue

The pairings above give you three classic starting points. The complementary color sits opposite on the wheel and works well as an accent that draws the eye. The analogous colors sit right beside Slate Blue for calmer, harmonious combinations. The triadic pair spaces three hues evenly for a balanced, energetic palette. Open any swatch to explore it as its own color.

Full values for Slate Blue

Format	Value
HEX	#6A5ACD
RGB	rgb(106, 90, 205)
HSL	hsl(248, 53%, 58%)
HSV	hsv(248, 56%, 80%)
CMYK	cmyk(48%, 56%, 0%, 20%)
OKLCH	oklch(54.36% 0.1712 285.54)
CIELAB	lab(45.34 36.04 -57.77)

Use Slate Blue in a tool

Nearby colors

Last updated 5 August 2026 by FusionStudios. Every value on this page is computed by the same functions the tools use. How this is calculated.