Pretty much. When painting a flame that you want to light source to be realistic, it is important to get the colors in the right order.
When you're painting flames to look like they were painted onto armor, the rules for making them look realistic don't apply. They're actually done both ways on these guys (check out the techmarine's boots). My client chose the style of flames (with the light outline) but I think they turned out quite nice.
And here are some more minis for the force:
