I saw some vector drawings that had the colors for the drawing encoded in the lines of the drawing and projected out in solid and gradient over the picture to give it color.
I cann't find them now.
Has anyone seen this and is it possible in Inkscape?
color encoded lines
Re: color encoded lines
Do you meen Diffusion curves? Or Gradient Meshes?
Has been discussed before, Not currently possible in SVG (and therefore Inkscape) people want it though
Has been discussed before, Not currently possible in SVG (and therefore Inkscape) people want it though

Re: color encoded lines
Off topic:
"Ben Hamstrung"I can't stop laughing!
Basics - Help menu > Tutorials
Manual - Inkscape: Guide to a Vector Drawing Program
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Inkscape for Cutting Design
Manual - Inkscape: Guide to a Vector Drawing Program
Inkscape Community - Inkscape FAQ - Gallery
Inkscape for Cutting Design