Dark slate blue

#644ba6

Hex, rgb, cmyk and Pantone values for dark slate blue, with shades, tints, matching colors and free print quality patterns.

Dark slate blue is a mid purple with a grounded cast. A mid purple this rich reads creative and a little premium. Pair it with warm yellows for contrast, or with charcoal for a moody scheme.

Dark slate blue color values

Every conversion for #644ba6, ready to copy. Hex, rgb, hsl, hsv, cmyk, cie-lab, xyz, decimal, web safe and the nearest Pantone.

Hex#644ba6
RGB100, 75, 166
HSL256, 38%, 47%
HSV256, 55%, 65%
CMYK40%, 55%, 0%, 35%
Lab38.72, 32.27, -45.64
XYZ14.65, 10.49, 37.33
Decimal6572966
Web safe#663399
Pantone2725 C
Pantone2725 CHex#644ba6Rgb100 75 166Cmyk40 55 0 35Lab39 32 -46Darker#291f44Deep#463575Lighter#8d7bbe

Shades of dark slate blue

Tints of dark slate blue

Colors that go with dark slate blue

Dark slate blue in print

It converts to cmyk cleanly and holds its character from screen to paper. The cmyk build is 40, 55, 0, 35.

The same color needs a different cmyk build depending on the paper. Here is #644ba6 on both.

Coated stockgloss or silk, C
40 55 0 35
Ink sits on the surface, so colors stay bright and close to screen.
Uncoated stocknatural or matte, U
41 55 4 41
The stock absorbs ink and gains dot, so it needs a heavier build and reads a touch softer.

This color converts to cmyk comfortably and should hold on press.

See how it converts in the rgb to cmyk converter, or read rgb vs cmyk for print and what the k in cmyk means.

Dark slate blue in css

Copy #644ba6 straight into your stylesheet.

.background { background-color: #644ba6; }
.text { color: #644ba6; }
.border { border: 2px solid #644ba6; }

How dark slate blue looks on light and dark

Dark slate blue and accessibility

Contrast ratios for #644ba6 against black and white text, measured to the WCAG standard.

Textwhite text on this color
6.78:1
AA pass · AA large pass · AAA fail
Textblack text on this color
3.10:1
AA fail · AA large pass · AAA fail

Use white text on this color for readable body copy. To test #644ba6 against any other color, not just black and white, run the pair through our contrast checker for a live WCAG reading.

Dark slate blue on a business card, sticker and pattern

A quick look at how #644ba6 sits on real print products. Start any of these in the maker.

Your nameFounderhello@brand.comBusiness card
Sticker
Repeat pattern

Building a full palette around dark slate blue? Pull matching colors from any photo with the color palette generator, or check a design for print with the rgb to cmyk converter.

Turn dark slate blue into a seamless pattern

Four patterns built from #644ba6 and its shades, free at print quality. Click any one to keep editing in the pattern maker.

Make posters, wallpaper and packaging art from dark slate blue, free and print ready.

Open in pattern maker

How we calculate these values

Every value on this page for #644ba6 is computed, not guessed. We convert from sRGB to each space with the standard formulas, so the codes match what design tools show. The uncoated cmyk build carries more ink than the coated one, which is what a printer would compensate for when the same color runs on a rougher stock. The Pantone value is the closest reference by perceptual color distance and should be treated as a starting point, not a guaranteed match.