Purple-ish legs...

When I was drying my legs this morning I noticed a purpleish kind of pattern on my legs on the inner side around the knees. I’m wondering if anyone has experienced similar? My legs are a lot chunkier than they were pre-pregnancy so I’m assuming it may be fluid retention/poor circulation. It’s winter on my side of the world so my legs are generally pretty cold. It doesn’t look like varicose veins.