to get: use: ------- --- WHITE 243 BLACK 244 RED 245 GREEN 246 BLUE 247 LTBLUE 248 MAGENTA 249 YELLOW 250 ORANGE 251 PURPLE 252 DARKGREEN 253 GRAY 254 for example, to have the first 3 shots red and the next 3 black: [245, 245, 245, 244, 244, 244] for a 10-element rainbow without yellow, e.g., use Color Indices for Lines: [1,25,49,73,97,121,188,207,225,243] IDL Color Table for Indices: -1 In MDSmultiSig.html (at least) you can enter a string array for colors, like: ['red','blue','green','black']