You should read up on the Color object... It's basically an array of a string and then some numbers.
For example, to specify an RGB value (RBGA is not possible) of 244, 109, 45 you would use:
app.runtimeHighlightColor = ["RGB", 244/255, 109/255, 45/255];
Notice the values are between 0 and 1, which is why I divided the numbers you provided (which I assume are between 0 and 255) by 255, to bring them to the correct model.
Cool! You saved my day again
Yes, I should read up to the color object, it's different thinking.... I have been searching how color is coded in Java, but couldn't find clear documentation. Can you advise on a doc for dummies?
That doc makes perfect sense