Are the non-white ones all the same variety?

All look extremely close to the house foundation which may develop into an issue at some point but that doesn’t explain why the last one is has a different appearance. Since it is around the corner, is it catching more shade than the others? Or, more moisture? It looks washed out and I see it’s receiving more water during this picture-taking.

The picture is to far away to diagnose the leaves but water, insects and dormancy are common causes around now. Inspect the shrub for a spider mite infestation to quickly rule that out and then ensure it is getting evenly moist soil. The soil should be tested at a depth of around 4 inches in several spots under the canopy and as soon as the soil is dry, irrigate it. If wet, skip irrigating. Test often when hot or if in a drought or test periodically once sustained cooler fall temperatures arrive. Water the soil directly (not the leaves nor the blooms) and deeply (8 inches). After irrigating the soil and waiting for the water to percolate, the soil at a depth of 8 inches should feel moist; if dry, you did not use enough water so consider irrigating again; if wet, use less water. If there is a spider mite infestation causing stippling of the leaves, use a miticide. Some leaf yellowing occurs when near dormancy. However if no insects are present and testing the soil moisture shows the soil is not evenly moist then consider watering as described earlier and check why the current form of irrigation is not watering enough there.

Yes all hydrangeas are little lime punch. The corner and side bloomed a few weeks after the first two.