The stool (the brown part) itself looks dry. You want a smooth full egg shaped stool. That there are two stools together suggests he hasn't defecated for awhile. I believe their digestive system is like ours--the longer the stool is in the colon, the more water is removed from it. That could also be why the urates have that orange part to it--they, too, have had water removed.
If he were mine, I would assume he is slightly dehydrated and work to overcome that. Try feeding particularly moist food such as hornworms and do a major increase in misting. Since it is summer, you can set his cage up under some trees (so he doesn't overheat) and run a mister attached to a garden hose for hours. The whole day will do him good whether he is dehydrated or not.
The area that most people don't pay attention to is the ambient humidity of the cages. Most keepers underestimate the importance of very humid air. I have not found those cheap humidity gauges to be anywhere near accurate. A lot of dehydration is caused by a lack of humidity.