The main difference between Copper and Grey is hue — Copper is a warm orange, while Grey is a neutral gray. Copper (#B87333) has an HSL of 29°, 57%, 46%, whereas Grey (#808080) sits at 0°, 0%, 50%.
Copper (#B87333) is a medium, moderately saturated orange with a warm undertone — it feels balanced, versatile and balanced in intensity.
Grey (#808080) 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.