- blue: Cu+2
- blue-green: Cu+2 flame
- brown: NO2 (g)
- deep blue: Cu(NH3)4+2 or Ni(NH3)4+2
- deep-red: Li+ flame
- green: Ba+2 flame
- green: Ni+2 or Cu+
- green: Cl2(g)
- orange: Fe+3 or Cr2O7-2
- orange-red: Ca+2 flame
- pink: Mn+2 or Co+2
- purple: MnO4-
- purple: I2(g)
- red: Sr+2 flame
- red: FeSCN2+
- red-brown: Br2(l)
- violet: K+ flame
- yellow: Na+ flame
- yellow: Fe+2 or CrO4-2