The concentration of a colorless solution cannot normally be determined with a colorimeter.

If you get the amounts right, the aqueous mixture is now a clear, colorless solution.

It can be painted onto a surface or kept as a colorless solution.

Two colorless solutions are mixed and at first there is no visible reaction.

A colorless solution of the reduced dye will turn blue upon exposure to air.

It dissolves in acids to make a colorless solution.

It is normally a colorless solution in water.

It is sold commercially as a colorless solution.

Periodic acid is found as a colorless solution.

In that very known and simple kinetic reaction two colorless solutions are mixed.