Your perception of it being hot was based on the material conducting
heat into your fingers when you touched it.

This is why I just always assumed that the wrenches I left out in the sun
"felt" so hot, but the other day I happened to leave some tools on the outside
window sill of my shop. When I went to retrieve them they were almost too hot
to hold. The strange thing is that the one black impact extension was far
cooler to the touch than the chrome ones.

I think there is a lot more to heat gain than just color and surface finish
than those of us unschooled in the ways of IR understand.