Color Assessment for Curves/geometries by size (area?)

[jannmeylor]

Is there way to assign color by using the size or length derived from these curves?? is this an option using rhino or should i use grasshopper??

thank you

[christopher.ho]

pipeline to input the curves.
length to get curve length, you could also use area.
bounds to find the limits
deconstruct domain to find start and finish
Gradient to get a colour.
Custom preview to preview over the curves.