The main difference between Forest Green and Dark Green is brightness and saturation: both are green shades, but Forest Green is lighter and Dark Green is more saturated. Forest Green (#228B22) and Dark Green (#006400) are similar colors often confused. They differ in brightness, saturation, and undertone, making each better suited for different design contexts.
Four real design scenarios, with the recommended pick based on hue, saturation, and WCAG contrast.
Dark Green is more saturated (100% HSL vs 61%) so it reads as bolder and more memorable at logo scale, while Forest Green can feel washed out when printed small.
Dark Green hits a 7.44:1 WCAG contrast against white — safer for text-heavy interfaces — where Forest Green only reaches 4.39:1 and risks failing AA at small body sizes.
Forest Green is a cool-leaning tone that flatters spring/summer collections and warmer skin undertones, while Dark Green leans cooler and is better suited to autumn/winter layering.
Forest Green is the more muted of the two (61% saturation) and sits more calmly on large wall surfaces, while Dark Green's higher chroma can overwhelm a room when used beyond accent pieces.
Forest Green (#228B22) is a dark, moderately saturated green with a cool-leaning undertone — it feels rich, serious, substantial and balanced in intensity.
Dark Green (#006400) is a dark, vivid green with a cool-leaning undertone — it feels rich, serious, substantial and bright, energetic, eye-catching.
Text legibility depends on the contrast ratio between foreground and background. WCAG 2.1 AA requires at least 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Use these numbers to choose accessible combinations for your design.
Each color has a dedicated page with shades, tints, CSS name, pairings, and color psychology.