The main difference between Baby Blue and Cerulean is brightness and saturation: both are cyan shades, but Baby Blue is lighter and Cerulean is more saturated. Baby Blue and Cerulean are often confused but have distinct differences in hue, saturation, and tone. Baby Blue (#89CFF0) and Cerulean (#007BA7) each suit different design contexts — understanding their differences helps you choose the right color for your project.
Four real design scenarios, with the recommended pick based on hue, saturation, and WCAG contrast.
Cerulean is more saturated (100% HSL vs 77%) so it reads as bolder and more memorable at logo scale, while Baby Blue can feel washed out when printed small.
Cerulean hits a 4.78:1 WCAG contrast against white — safer for text-heavy interfaces — where Baby Blue only reaches 1.71:1 and risks failing AA at small body sizes.
Baby Blue is a cool-leaning tone that flatters spring/summer collections and warmer skin undertones, while Cerulean leans cooler and is better suited to autumn/winter layering.
Baby Blue is the more muted of the two (77% saturation) and sits more calmly on large wall surfaces, while Cerulean's higher chroma can overwhelm a room when used beyond accent pieces.
Baby Blue (#89CFF0) is a light, vivid cyan with a cool undertone — it feels airy, soft, approachable and bright, energetic, eye-catching.
Cerulean (#007BA7) is a dark, vivid cyan with a cool 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.