DO - Go with copper and caramel tones throughout your hair. You can even have golden blond highlights to give contrast.
DON'T - Go with ash tones - to see examples of this, look at the summer and winter hair colours below.
DO - Go with golden to honey blonde colours. These colours can be used as highlights to enhance your natural hair colour. If you have darker hair naturally, soft caramel would look good too.
DON'T - Avoid ash blond as it can make you look washed you out.
DO - Go with ash tones - silver blonde highlights will give tone to natural hair colour and is good to cover greys. If you're a brunette, the plums and burgandies work quite well too.
DON'T - Go with warm colours as they do not suit you. Avoid coppers and golds - to see examples, see the autumn and spring hair colours.
DO - Go with iridescent shades such as violet and redcurrant. These are fun colours to make your natural hair colour stand out. Just a note however, Winters always look best in their natural hair colour.
DON'T - Dye your hair blonde, it will wash you out and not work with your colours.