need some info to rebuild my heads

[k9sar]

So I tore into the spare engine I had sitting around and removed the heads, rockers, springs etc so I could pressure wash and degrease the whole mess. My plan was to recondition these heads, do a valve job, replace seals etc and have a pair of heads ready to swap in when I disassemble the truck this weekend. After hitting the parts with sodium hydroxide and getting rid of the varnished oil and gunk, I discovered that the valve springs have colored markings on them. The outer springs are marked greenish at one end and the inner are pinkish at one end (or do I have that reversed?). anyway...Here's my question... probably not critical but I want to do it right... Do the colored ends go up or down?