or if you are really intersted in getting accurate color you need to calibrate your monitor with something like this (just bought it - works great): http://www.pantone.com/pages/products/product.aspx?ca=2&pid=79 but you might not need that, you could always eye ball it
to solve that problem, find an everyday product at home, and look up the product on the net and set the colours so they match the can of beans, soap powder box you have in your hand. then thats has to be close enough.
somethings are so simple it takes a woman to point it out to a man naaa i had the same problem a few years ago and it was bugging me for 2 months and i just looked at a page for air freshener and left the pc on while i went and got it, then placing it down by my pc, i seen the colours where way out, and then it hit me how to fix it.