Dark Slate Gray

Hex #2F4F4F, rgb(47 79 79). A gray or black CSS named color.

Dark Slate Gray#2F4F4F

Dark Slate Gray color codes

Click any value to copy it.

HEX
RGB
HSL
HSV
HWB
CMYK
OKLCH
OKLab
Lab
LCH
CSS keyword

About Dark Slate Gray

Dark Slate Gray is a dark neutral gray with the hex code #2F4F4F. In RGB it is made of 47 red, 79 green and 79 blue; in HSL its hue is 180°, with 25% saturation and 25% lightness. Its perceptual lightness (OKLCH L) is 40.3%.

It is a CSS named color, so you can write "darkslategray" or "darkslategrey" anywhere CSS accepts a color. Against white it has a contrast ratio of 8.93:1 and against black 2.35:1, so white text reads better on it and passes WCAG AA for normal text.

Also written as Dark Slate Grey: CSS treats both spellings as the same color.

Tints, shades and tones

Dark Slate Gray mixed step by step with white, black and middle gray (#808080).

Tints (with white)

Shades (with black)

Tones (with gray)

Dark Slate Gray 50-950 scale

A Tailwind-style scale built in OKLCH; the original color sits on the step with the closest lightness.

Colors that go with Dark Slate Gray

Color harmonies rotate the hue in OKLCH and keep the lightness and chroma. Each color links to its closest named color.

Complementary

Analogous

Triadic

Split complementary

Tetradic

Square

Monochromatic

Contrast and readability

WCAG 2 contrast of Dark Slate Gray with white and black. The readable text color on Dark Slate Gray is white.

Dark Slate Gray textSmall text on white

On white8.93:1

AA pass
AA Large pass
AAA pass
UI 3:1 pass

APCA Lc 90

Dark Slate Gray textSmall text on black

On black2.35:1

AA fail
AA Large fail
AAA fail
UI 3:1 fail

APCA Lc -12

White text on Dark Slate Gray (#FFFFFF)

Test any pair in the contrast checker.

Color blindness preview

How Dark Slate Gray appears with each type of color vision deficiency (simulated with the Machado model).

Protanopia#4B4C4F
Deuteranopia#45484F
Tritanopia#22514F
Protanomaly#454C4F
Deuteranomaly#414A4F
Tritanomaly#2A504F
Achromatopsia#4A4A4A

Colors similar to Dark Slate Gray

The closest named colors by perceptual difference (OKLab).

Use Dark Slate Gray in CSS and Tailwind

CSS

.dark-slate-gray {
  color: darkslategray; /* #2F4F4F */
  background-color: rgb(47 79 79);
  border-color: oklch(40.3% 0.038 195.8);
}

Tailwind CSS

/* Tailwind CSS v4: bg-dark-slate-gray-500, text-dark-slate-gray-700... */
@theme {
  --color-dark-slate-gray-50: #F7FBFB;
  --color-dark-slate-gray-100: #E7F1F0;
  --color-dark-slate-gray-200: #CFE2E1;
  --color-dark-slate-gray-300: #AACCCB;
  --color-dark-slate-gray-400: #7AAEAE;
  --color-dark-slate-gray-500: #5C9B9B;
  --color-dark-slate-gray-600: #4B8888;
  --color-dark-slate-gray-700: #3E7171;
  --color-dark-slate-gray-800: #355E5E;
  --color-dark-slate-gray-900: #2F4F4F;
  --color-dark-slate-gray-950: #061A1A;
}

<!-- or the exact color, no config -->
<div class="bg-[#2F4F4F] text-[#FFFFFF]">…</div>