Quote 引用元:Kiote 投稿を閲覧
You do not need a test to confirm what the Colors do. Yoshida has already stated publicly:

White - Normal Success, Normal Quality
Red - Lower Success, Higher Quality
Yellow - Lowest Success, Highest Quality
Slow Rainbow - Higher Chance of Destabilizing
Fast Rainbow - Highest Chance of Destabilizing
This is true. However its not true that rainbow has "no redeeming qualities".

Quote 引用元:Raldo

Highest Success <----------> Lowest Success
Lowest Quality Gain <-------> Highest Quality Gain (upon success)
White <> Yellow <> Red <> Flashing/Rainbow
This is wrong. The above list was from Yoshida himself... you're just twisting the statement "The light may also turn from yellow, to red, to multiple colors flashing rapidly" to mean the actual progression of increased destabilization which is just a wild (and incorrect) guess.