its from the jeans, i have it both in my GX and RX and my cousin has the same problem in her IS its a problem with all Lexus seats

what you can do is get a wash cloth dampen it put some detergent, and lightly i mean very lightly go over those areas, you can see the blue transfer to the cloth and then finish up with some leather lotion
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Got my 04 GX KDSS, REAS, NAV/ML Decked out on 03-19-04
03 GX 470 --> Loaded --> sold --> waiting for 04 GX 470 Blue Meridian loaded... hopefully it will be > 6000 lbs
Blue Meridian
I love this car