Veg stage

My bottom leaves have recently been turning dark to a light color I'm still currently in veg. I didn't balance the ph for a while The strain is Ken's GDP though. Any ideas. Less than 15percent of the plant has it the rest the leaves r getting dark purple

Research your strain it may be normal. I had a plant once that developed a groovy bronze color. She smoked really well too.

Looks to be a possible phosphorus deficit. However without knowing the details of your grow its just a guess due to the coloring.

Bronze baby woot! It got better but I lack proof.