The main difference between Aqua and Pewter is hue — Aqua is a cool cyan, while Pewter is a neutral gray. Aqua (#00FFFF) has an HSL of 180°, 100%, 50%, whereas Pewter (#8E9191) sits at 180°, 1%, 56%.
Four real design scenarios, with the recommended pick based on hue, saturation, and WCAG contrast.
Aqua is more saturated (100% HSL vs 1%) so it reads as bolder and more memorable at logo scale, while Pewter can feel washed out when printed small.
Pewter hits a 3.18:1 WCAG contrast against white — safer for text-heavy interfaces — where Aqua only reaches 1.25:1 and risks failing AA at small body sizes.
Pewter is a cool-leaning tone that flatters spring/summer collections and warmer skin undertones, while Aqua leans cooler and is better suited to autumn/winter layering.
Pewter is the more muted of the two (1% saturation) and sits more calmly on large wall surfaces, while Aqua's higher chroma can overwhelm a room when used beyond accent pieces.
Aqua (#00FFFF) is a medium, vivid cyan with a cool undertone — it feels balanced, versatile and bright, energetic, eye-catching.
Pewter (#8E9191) is a medium, near-neutral gray with a neutral undertone — it feels balanced, versatile and desaturated and restrained.
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.