To find out how close Spring Green is to 70's Lime Green. For the record, I do not have 70's lime kettle, but found some comparison topic I can use.
First, the shade difference between Spring Green, Lime Green on SJ, and Grass Green on C&B Performer. It gets couple of shade darker from front to back.
Lime Green SJ and 70's Lime comparison. Refer to this Topic.
http://weberkettleclub.com/forums/weber-kettles-accessories/greenery-identification/Make a note of shade difference.
Here is Lime SJ and Spring Green comparison.
See how the Spring Green is couple of shades lighter. So, with much interest, I am finding that Spring Green color is almost exact or very close to 70's Lime. Your results may differ slightly.
Spring Green pics in diff. lighting.
I found this interesting and wanted to share as I did not realize this before.