… this fact has been understood and employed by artists of all sorts, including garden designers, for many years.
Interested, as we are, in how best to grow plants I think it naturally follows to give significant thought to their colour and placing so, @matthewdavidbrown, thank you for the question.
That's surely the point though - if you like that, then you have it.
I loathe the brash colour of Hypericum flowers, and forsythia, but I love golden yellows. If you want to 'tame' the colour, then add other planting which softens it, or use creamy yellows rather than strong ones. If you want a really strong, 'hit me with a blast of colour' effect, then nothing's off the menu
I live in west central Scotland - not where that photo is...
Years ago they were thinking of changing the colour of fire engines to yellow so they would be noticed note on the road.