They are also known as just Color Pack Egg Layers or Color Pack Blue Egg Layers.
Here is a website link for some information on them:
https://www.polarishatchery.com/products/colorpack-egg-layer-pullets-females
Beautiful hen!
You are right that she to lightly colored and she should have more gray, but she is mostly brown. I think she is a Cream Legbar mix. Definitely not pure.
Where did you get her from?
I think she is a Color Pack Easter Egger. Color Pack Easter Eggers are normally Cream Legbar mixes.