Dark Slate Gray Hex Code — #2F4F4F

The hex color code for Dark Slate Gray is #2F4F4F. In CSS, apply it as text color with color: #2F4F4F;, as a background with background-color: #2F4F4F;, or as a border with border-color: #2F4F4F;. Hex is the most widely used color notation on the web because it is compact, supported by every browser, and easy to copy between design tools like Figma, Photoshop, and code editors.

Dark Slate Gray in RGB is rgb(47, 79, 79), where Red=47, Green=79, and Blue=79 on a 0-255 scale. Use RGB when you need transparency — rgba(47, 79, 79, 0.5) creates a 50% transparent version. RGB is also the native format for HTML canvas, WebGL, and JavaScript image manipulation, since each channel represents the intensity of that primary light color on screen displays.

Dark Slate Gray can be applied in CSS using multiple formats: (1) Hex: color: #2F4F4F; — most compact and widely used. (2) RGB: color: rgb(47, 79, 79); — useful when calculating colors dynamically in JavaScript. (3) HSL: color: hsl(180, 25%, 25%); — best for creating variations, since adjusting lightness produces lighter or darker shades while keeping the same hue. (4) With transparency: rgba(47, 79, 79, 0.8); or hsla(180, 25%, 25%, 0.8); for 80% opacity overlays.

Dark Slate Gray in HSL is hsl(180, 25%, 25%). HSL stands for Hue (180 degrees on the color wheel), Saturation (25% color intensity), and Lightness (25% brightness). HSL is the most intuitive format for designers because you can create harmonious palettes by rotating the hue, generate hover effects by increasing lightness by 10%, and desaturate colors by reducing the S value. This makes Dark Slate Gray a dark, muted cool-toned color.

Dark Slate Gray in CMYK is C:41% M:0% Y:0% K:69%. CMYK (Cyan, Magenta, Yellow, Key/Black) is the standard color model for professional printing — business cards, brochures, merchandise, and packaging. When designing for print in Adobe InDesign or Illustrator, use these exact CMYK values to ensure accurate color reproduction. Screen colors (RGB) often appear more vibrant than their printed CMYK equivalents, so always request a physical proof for brand-critical materials.

Gray is the ultimate neutral — it pairs with every color. Match warm grays with warm palettes and cool grays with cool palettes. Gray backgrounds let accent colors stand out prominently.

Gray text is the most common accessibility failure on the web. For body text, stick to #595959 or darker on white. For large headings (18px+ bold), #767676 is the lightest acceptable gray. For Dark Slate Gray specifically: as a dark shade (lightness: 25%), it can work as a text color on light backgrounds, but verify the exact contrast ratio using a contrast checker tool. WCAG 2.1 requires a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text (18px+ bold or 24px+ regular).