The suffix "R" in the name of Coomassie Brilliant Blue R-250 is an abbreviation for Red as the blue colour of the dye has a slight reddish tint. For the "G" variant the blue colour has a more greenish tint.(from wikipedia)
The colour of the two dyes depends on the acidity of the solution. The "G" form of the dye has been studied in detail.At a pH of less than 0 the dye has a red colour with an absorption maximum at a wavelength of 470 nm. At a pH of around 1 the dye is green with an absorption maximum at 620 nm while above pH 2 the dye is bright blue with a maximum at 595 nm.
If you have more knowledge of the Coomassie Brilliant Blue G-250,you will assure that you have got the right color.8D