What causes Copper Rose? We made a solution of Tetrakis Copper(I) hexafluorophosphate and the usual color is yellowish. As it oxidizes to Cu(II), it should turn blue.

However, our current mixture has an off color that is pink. Looking up alternative copper colors, there will be copper rose. What would cause that color?
I assume you mean tetrakis(acetonitrile)copper(I) hexafluorophosphate. This compound contains a tetrahedral complex of $\ce{Cu+}$ with 4 $\ce{CH3CN}$ ligands which stabilize the copper(I) center. They are, however, easily exchanged in the presence of other potential ligands, and with water, disproportionation to $\ce{Cu^2+}$ and elemental $\ce{Cu}$ will occur.

$$\ce{2[Cu(CH3CN)4]^+ + 6H2O -&gt;~ [Cu(H2O)6]^2+ + Cu\downarrow + 8 CH3CN }$$

The pale blue color of the hexaaquacopper(II) complex might not be visible at low concentrations, and the pink color that you have observed arises from fine particles of the elemental $\ce{Cu}$ precipitate.