The main difference between Denim and Steel Blue is brightness and saturation: both are blue shades, but Steel Blue is lighter and Denim is more saturated. Denim and Steel Blue are often confused but have distinct differences in hue, saturation, and tone. Denim (#1560BD) and Steel Blue (#4682B4) 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.
Denim is more saturated (80% HSL vs 44%) so it reads as bolder and more memorable at logo scale, while Steel Blue can feel washed out when printed small.
Denim hits a 6.10:1 WCAG contrast against white — safer for text-heavy interfaces — where Steel Blue only reaches 4.11:1 and risks failing AA at small body sizes.
Steel Blue is a cool-leaning tone that flatters spring/summer collections and warmer skin undertones, while Denim leans cooler and is better suited to autumn/winter layering.
Steel Blue is the more muted of the two (44% saturation) and sits more calmly on large wall surfaces, while Denim's higher chroma can overwhelm a room when used beyond accent pieces.
Denim (#1560BD) is a medium, vivid blue with a cool undertone — it feels balanced, versatile and bright, energetic, eye-catching.
Steel Blue (#4682B4) is a medium, moderately saturated blue with a cool 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.