Health Status

HDD

Health Status Color Description
Good Blue  
Caution Yellow  
Bad Red  
Unknown Gray  

CrystalDiskInfo reports "Caution" if it detects the raw value over the threshold value (Health Status Setting)

Reference

SSD

Intel, MTRON, SAMSUNG, Indilinx, SandForce, JMicron JMF61x and Micron controller SSD

Health Status Color Description
Good Blue  
Caution Yellow Remaining Life <= 10%
Bad Red Remaining Life < Threshold value (Vendor Define)

Reference S.M.A.R.T. Attribute ID

Other SSD

Health Status Color Description
Good Blue  
Caution Yellow  
Bad Red  
Unknown Gray