Australian government research has found the world's ugliest colour.

Apparently the research was done to find out what colour cigarette packets should be, but it's also handy for interior decorators!
Other colours considered were lime green, white, beige, dark grey and mustard. But none came close to Pantone 448C in terms of its ability to ‘‘minimise appeal’’ and ‘‘maximise perceived harm’’. Pantone 448C was commonly described as ‘death’, ‘dirty’ or ‘tar’ without any positive adjectives.
What do you think are some of the colours you should never, ever use when painting your house?