Yes, succulents and cactus can change colors throughout the year based on multiple factors such as length of day, heat, water, fertilizer, soil etc. Some succulents look vibrant during certain months and other times can look more dull. Some months they may be more green with other months/factors bringing out more colors and hues on the edges. "Stressing" a succulent can sometimes increase and or cause brighter hues. Stressing is done by exposing a succulent to extreme sun and minimal water. Be careful not to burn.This does not work on all types.