Transition metal ion colours
Ti 3+
Purple
Co 2+
pink
Cu 2+
blue
Fe 2+
pale green
Fe 3+
pale yellow
Mn 2+
pale pink
Mn 7+
purple
V2+
purple
V 3+
green
V 4+
blue
V 5+
yellow
Cr 2+
blue
Cr 3+
green
Cr 6+
orange
Purple
pink
blue
pale green
pale yellow
pale pink
purple
purple
green
blue
yellow
blue
green
orange