Our home hair dye-loving OK! tester, who says she’s been plagued with grey hairs for years, puts Revlon’s new £5.50 home colour to the test on her ‘flat’ brunette hair to incredible results Our home hair dye-loving OK! tester, who says she’s been plagued with grey hairs for years, puts Revlon’s new £5.50 home colour to the test on her ‘flat’ brunette hair to incredible results Lifestyle