The main difference between Medium Sea Green and Emerald Green is brightness and saturation: both are green shades, but Emerald Green is lighter. Medium Sea Green (#3CB371) has an HSL of 147°, 50%, 47%, whereas Emerald Green (#50C878) sits at 140°, 52%, 55%.
Four real design scenarios, with the recommended pick based on hue, saturation, and WCAG contrast.
Emerald Green is more saturated (52% HSL vs 50%) so it reads as bolder and more memorable at logo scale, while Medium Sea Green can feel washed out when printed small.
Medium Sea Green hits a 2.67:1 WCAG contrast against white — safer for text-heavy interfaces — where Emerald Green only reaches 2.13:1 and risks failing AA at small body sizes.
Emerald Green is a cool-leaning tone that flatters spring/summer collections and warmer skin undertones, while Medium Sea Green leans cooler and is better suited to autumn/winter layering.
Medium Sea Green is the more muted of the two (50% saturation) and sits more calmly on large wall surfaces, while Emerald Green's higher chroma can overwhelm a room when used beyond accent pieces.
Medium Sea Green (#3CB371) is a medium, moderately saturated green with a cool-leaning undertone — it feels balanced, versatile and balanced in intensity.
Emerald Green (#50C878) is a medium, moderately saturated green with a cool-leaning undertone — it feels balanced, versatile and balanced in intensity.
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.