You might not have to buy a brand new dishwasher or get a special door panel kit to make your dishwasher fit in more with the rest of your kitchen. Many dishwasher panels are reversible.
All you have to do, according to The Junk Drawer, is remove the screws at the bottom of the dishwasher door that holds the panel in. Slip out the panel and look behind to see if the reverse side is another colour.
White and black are common combinations, but you might find other ones. According to a brief search, many Whirlpool dishwashers have this secret other dishwasher colour, but other brands might as well. Worth a peek if you're not happy with the colour of your dishwasher.
How to Change the Color of a Whirlpool Dishwasher [The Junk Drawer]