Colored capsules indicate a "chaser" or limited edition issue. Usually harder to get to increase play on the machine. There have been several colors used from different casinos. Some of the blue capsules are very common because they issued 1000 - 1500 of them. Other colors are limited from 100 - 150 very hard to find. There has been yellow, blue, red, pink used that I know of but I can not place a red capsule from IP unless it came out this week. Either they have just issued a chaser or someone has switched the cap to this strike trying to sell it for more. Do you have a scan?