Here's a breakdown:

* Anhydrous sodium phosphate (Na3PO4) is a white, crystalline solid.

* Sodium phosphate monobasic (NaH2PO4) is a white, crystalline solid.

* Sodium phosphate dibasic (Na2HPO4) is a white, crystalline solid.

* Sodium phosphate tribasic (Na3PO4) is a white, crystalline solid.

However, the exact color of a sodium phosphate sample can vary slightly depending on its purity and any impurities present.