Worn once DENIM FORUM Lola high rise sz 30/30 inseam

Traditional blue jean wash, LOLA high rise. stretch skinny jean from DENIM FORUM. Size 30 waist, 30" inseam. Bought from Aritzia. I washed them one time before wearing them and then found the length is not my usual (28"). I don't know why, but after washing once the back waist label had a slight darkening. I have provided a photo of it in 5th photo. Great classic jean, very comfy and easy to wear. LIKE NEW, never worn.