combo chart color measures by expression

[#1]

i'm using a combo chart to display two measures.  the two measure expressions are:

sum(if([Availability woMW Severity]='Major',1,0))

sum(if([Availability woMW Severity]='Minor',1,0))

the resulting graph is:

i need to assign a specific color to each line.  using the color by expression.  i tried a few iterations of the following, but it's not doing it for me.  any suggestions?

if("Availability woMW Severity"='Major',RGB(255,0,0),if("Availability woMW Severity"='Minor',RGB(255,165,0)))

is there a way to refer to a measure in an expression by using it's label, etc?  i.e. the two measures have labels "Major count" and "Minor count".  wondering if there's a function that allows something along the lines of if(MeasureLabel = "Major count",red,if(MeasureLabel = "Minor count",orange))

[GregWP]

hi, this would be really useful - is it available yet?

I have a line chart with two measures that show 'Actual LTD' & 'Target LTD' by month. 

I simply want to gray-out those months prior to the current year-month selection. This part I can do ok, but I can't figure how to set a different colour for each measure in the 'else' part of the If statement?