Element -Flame Color
Cu - green
Li - red
K - violet
Sr - scarlet
Na - yellow
Ca - orange-red
Ba - yellow-green
Cs - deep violet
Ion - Color
Mn2+ - pink
MnO41- - purple
Cr3+ - dark green
CrO42- - yellow
Cr2O72- - orange
Fe2+ - green
Fe3+ - yellow
Co2+ in H2O - pink
Co2+ in acid - blue purple
Cu2+ - blue
Cu1+ - green
Ni2+ - green
Precipitate Colors (a sampling)
silver chloride - white
silver sulfide - black
silver oxide - black (commonly called tarnish)
lead chloride - white
mercury (II) chloride - white
lead chromate - yellow
mercury (II) oxide - black
aluminum hydroxide - white
iron (III) thiocyanate - blood red
copper(II) hydroxide - thick light blue
copper ammonia complex - thick dark blue
Halogens & Others
Cl2 gas - greenish yellow
I2 solid - purple
NO2 - colorless
N2O4 - brown