Sea Green Hex Code — #2E8B57

The hex color code for Sea Green is #2E8B57. In CSS, apply it as text color with color: #2E8B57;, as a background with background-color: #2E8B57;, or as a border with border-color: #2E8B57;. 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.

Sea Green in RGB is rgb(46, 139, 87), where Red=46, Green=139, and Blue=87 on a 0-255 scale. Use RGB when you need transparency — rgba(46, 139, 87, 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.

Sea Green can be applied in CSS using multiple formats: (1) Hex: color: #2E8B57; — most compact and widely used. (2) RGB: color: rgb(46, 139, 87); — useful when calculating colors dynamically in JavaScript. (3) HSL: color: hsl(146, 50%, 36%); — best for creating variations, since adjusting lightness produces lighter or darker shades while keeping the same hue. (4) With transparency: rgba(46, 139, 87, 0.8); or hsla(146, 50%, 36%, 0.8); for 80% opacity overlays.

Sea Green in HSL is hsl(146, 50%, 36%). HSL stands for Hue (146 degrees on the color wheel), Saturation (50% color intensity), and Lightness (36% 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 Sea Green a dark, moderate neutral-toned color.

Sea Green in CMYK is C:67% M:0% Y:37% K:45%. 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.

Green pairs naturally with white, cream, and brown tones. Dark greens work with gold for a luxury feel. In UI design, green is universally associated with success, confirmation, and positive actions.

Green text needs to be dark enough for contrast (below #2E7D32 on white). Never rely solely on red/green to distinguish states — about 1 in 12 men cannot distinguish between these two colors. For Sea Green specifically: as a dark shade (lightness: 36%), 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).