What’s the best way to get natural looking color into the surrounding landscape?
Two things with regard to lots of color. If you take the time to plant bulbs in the fall, they will come up in the spring and give you boatloads of color. The second dash of color comes from annuals like impatiens and petunias. Impatiens, in particular, love the water and grow nicely in the pond or the stream, blooming late into the year giving you a season-long splash of color.