Vanadium is the 23rd element. There is a bit more information on the blog post: Tones of Vanadium.

Angstroms	Nanometers	Color	Hertz	Note	Hertz
3703.574	370	Ultraviolet	368.1	F#4	369.994
3855.845	386	Violet	353.57
3902.256	390	Violet	349.36	F4	349.228
4111.78	411	Violet	331.56
4115.18	412	Violet	331.29
4131.989	413	Violet	329.94	E4	329.628
4379.23	438	Violet	311.31	D#4	311.12
4384.71	438	Violet	310.92
4389.98	439	Violet	310.55
4395.223	439.5	Violet	310.18
4408.195	441	Violet	309.26
4408.501	441	Violet	309.24
6090.21	609	Orange	223.85	A3	220

Orange

Violet

 

 

 

Ultraviolet

Vanadium Scale

Vanadium Sound Sketch