Graphic of legend for enhanced IR charts
Colors Temps (C) Temps (F) Description
dark cyan -32 to -43 -25 to -45 Jet stream and anvil clouds
cyan -43 to -54 -45 to -65  
light blue -54 to -60 -65 to -76 Thick jet stream clouds
dark blue -60 to -64 -76 to -83 Strong thunderstorm tops
dark green -64 to -70 -83 to -94  
green -70 to -76 -94 to -105 Severe thunderstorm tops
brown -76 to -81 -105 to -114 Strong Hurricane tops
yellow -81 to -90 -114 to -130