This is a cool spider that’s caught itself a big meal. The White Crab Spider (Misumena vatia, #480) can change its colour depending on the flower it is on. It hides on the flower pouncing on any unsuspecting insect and grabbing it with its strong front legs. It may not be able to do blue - not that it seems to have mattered much in this case - but like a chameleon it can change its colour from white to yellow or green in order to blend in. In the US it is called the Golden Rod Spider as it’s commonly found, coloured yellow, on Golden Rod later in the summer when this in flower and covered in pollinating insects. It’s not such a common species in UK, only found in the South of England, so I’m happy to have found one in my garden.