From C_Player entity:

• m_shieldHealth (int at offset 0x170): Current shield points (0-125).
• m_shieldHealthMax (int at offset 0x174): Max shield tier (50=White, 75=Blue, 100=Purple, 125=Red).
• m_helmetType (int at offset 0x4600): Helmet tier reduction multiplier.

Draw dynamic armor icon with shield health bar on your overlay to know exactly which enemy has Red Evo armor before pushing fights.

Colored shield bars (White, Blue, Purple, Red) look great on ESP.

Very helpful for team callouts in ranked games.