Hi Scotty,
Sorry for the late response. I have the Electorate of Colgne Uniform CD by Robert Hall and Martin J Berg. Uniforms of the Electorate seem to be a bit varied. The same shade of blue is not necessarily used throughout the army. They are taking the information from a painting of the ordination at Lille. I'm not sure if this is a painting of an ordination at Lille or if it is housed at Lille.
Anyway, the lighting in the picture suggests that some uniforms could be medium blue and others light blue. They seem to think that the uniforms are not as light as sky blue in any case. No mention is made of a Cuirass so I would suspect that the Horse in the Electorate's army are unarmored. Here is what I have from the plates on the CD.
Hartschiere Leibgarde zu Pferd
Medium or light blue uniform with red cuffs. White hat trim. Blue lining and breeches.
Chassonville Dragoner
Scarlet uniform with white cuffs and lining. No hat trim. White lining and ivory breeches.
Leibregiment d'Arco Cologne
Scarlet uniform and black cuffs. White hat trim.
White lining and ivory breeches.
Dolbenstein zu Pferd
Perl gray uniform with black cuffs. Yellow hat trim. Gray lining and ivory breeches.
Leibregiment Dragoner, Nothaft
Medium to light blue uniform and white cuffs. No hat trim. White lining and breeches.
BTW musician uniforms seem to be blue for red wearing cavalry regiments and red for blue wearing cavalry regiments. Probably all have white lace.
Hope that helps.
John