Bees seem to have a few favorite colors--they prefer flowers that are yellow, white, purple, or blue. They also prefer flowers with ultra-violet markings. (Bees can see in the ultra-violet spectrum, but humans can not.) Bees are also more attracted to flowers that have a mixture of several colors rather than just one color.
If you want to plant a bee-friendly garden, you can plant flowers or herbs.
Bees like flowers that have a strong scent, so if it has a perfume-like smell to you, the bee will probably like it. Here are a few of the flowers that bees particularly like: sunflower, calendula, lilacs, wisteria, snap-dragons, poppies, black-eyed susan, lantana, and many more.
Here are some commonly grown flowers for colder climates that honey bees love: aster, coneflowers, delphiniums, alyssum, rhododendrons, and others.
Here are a few common herbs that you can buy in most stores that sell plants that honeybees seem to particularly like: chives, mint, oregano, lavender, rosemary, sage, and thyme.