Gap filler

This is piece  of ground, about the size of my hand, where my drive meets the footpath. Impossible to keep weed free, and is always very wet. Damp even after this long dry spell.
So it’s usually left to do its own thing.
Yesterday it decided to be decorative and positively glowed in the afternoon sun. It was still glowing today, so it had to be today’s blip.
The colour is provided by what I think( probably incorrectly) is yellow deadnettle