Make the blue and red gelatin: Dissolve the red and blue gelatin in 2 separate bowls with 1 cup of boiling water each. Stir until the gelatin is completely dissolved.
Add 1 cup of cold water to each bowl, stir and pour into separate 9-inch pans.
Chill until set, about 4 hours.
Make the white gelatin: Dissolve the envelope of gelatin in ¼ cup of water. Add 1 cup of boiling water and stir until completely dissolved.
Stir in sugar, vanilla or almond, sour cream and cool whip.
Pour into a 9-inch pan and chill until set, about 4 hours.
When ready to serve, cut the gelatin into squares and layer in parfait glasses.