The main difference between Green Yellow and Sage Green is brightness and saturation: both are yellow-green shades, but they share similar brightness and Green Yellow is more saturated. Green Yellow (#ADFF2F) has an HSL of 84°, 100%, 59%, whereas Sage Green (#9CAF88) sits at 89°, 20%, 61%.
Four real design scenarios, with the recommended pick based on hue, saturation, and WCAG contrast.
Green Yellow is more saturated (100% HSL vs 20%) so it reads as bolder and more memorable at logo scale, while Sage Green can feel washed out when printed small.
Sage Green hits a 2.36:1 WCAG contrast against white — safer for text-heavy interfaces — where Green Yellow only reaches 1.23:1 and risks failing AA at small body sizes.
Sage Green is a cool-leaning tone that flatters spring/summer collections and warmer skin undertones, while Green Yellow leans cooler and is better suited to autumn/winter layering.
Sage Green is the more muted of the two (20% saturation) and sits more calmly on large wall surfaces, while Green Yellow's higher chroma can overwhelm a room when used beyond accent pieces.
Green Yellow (#ADFF2F) is a medium, vivid yellow-green with a cool-leaning undertone — it feels balanced, versatile and bright, energetic, eye-catching.
Sage Green (#9CAF88) is a light, muted yellow-green with a cool-leaning undertone — it feels airy, soft, approachable and subdued, sophisticated.
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.