Beginner Gardening: Tradescantia,which one?, 1 by Evie21

Evie21 wrote:
Hi again everyone,I have a problem with my Tradescantia,I got such a helpful response last time,I hoped someone could give me some more advice please,whats happened is,the leaves of the plant seem to be losing some of the greenness,it was really dark green,but now its sort of faded,I have it in a north facing window and it gets some very early sun,I'm wondering if it gets enough,or is there something else I'm not doing right ?.I hope the photo is ok,Any ideas would be gratefully accepted.Thanks.