Yellow

I took this picture with my mobile phone this morning on a walk up the village to the Post Office with the thought of entering it into the EP18 challenge, it wasn't until I checked the challenge details that I realised grey or black didn't count.
It was the light shining on the yellow plastic that caught my eye and the black iron railings. 

Challenge fail, so now I've desaturated the little bit of colour from the stone wall to make it more contrasty and blip it Yellow.

Update: I decided to tag it anyway and share my Biochromatic attempt. I'll have another go.