The main difference between Firebrick and Espresso is brightness and saturation: both are red shades, but Firebrick is lighter and Firebrick is more saturated. Firebrick (#B22222) has an HSL of 0°, 68%, 42%, whereas Espresso (#3C1414) sits at 0°, 50%, 16%.
Firebrick (#B22222) is a medium, moderately saturated red with a warm undertone — it feels balanced, versatile and balanced in intensity.
Espresso (#3C1414) is a very dark, moderately saturated red with a warm undertone — it feels deep, heavy, grounded 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.
Each color has a dedicated page with shades, tints, CSS name, pairings, and color psychology.