How to Change Colors When Painting Curved Drywall Corners

Curved drywall corners (usually referred to as bullnose corners) soften corners and are often seen in Spanish-style contemporary homes. When changing paint colors to transition from one to another, you're presented with a small challenge: making a clean, straight line on the curved corner or seamlessly blending one color into the other. With blue painter's tape and a little care, it's not difficult to make a straight line transition even on textured corners. If you prefer the blended look, there's a nifty tool that will make that easy if you're not much of an artist.

Painting a Straight Line

  1. Paint the first wall with the most dominant color, wrapping the paint well around the bullnose corner. Let it dry for at least 4 hours.

  2. Lay a strip of blue painter's tape either straight down the center of the curve or to one side of the curve. Press it down carefully with your fingers to ensure a tight seal. Use a chalk line to ensure a perfectly straight line, but it's usually enough to "eyeball" it.

  3. Paint your second color up to the tape with either a brush or roller. Avoid pushing the paint towards and under the tape. Two thin coats is better than one thick coat.

  4. Wait at least another 4 hours before slowly and carefully removing the tape. If the tape was rubbed down carefully and the paint allowed to dry for at least 4 hours, it should be perfect. If there are any irregularities, fix them with an artist's brush.

Painting a Blended Line

  1. Paint both walls to the corner, allowing the paint to meet up. It's not necessary to have the line perfectly straight.

  2. Pour a little of each color into a large plate or roller tray. Working quickly, mix them together to get several shades and stipple them onto the corner with an artist's brush so they blend seamlessly.

  3. Use a roller tool to blend the colors together very efficiently, following the product directions. (See Resources.)


  • Regular beige masking tape will not give you a clean line, especially on textured drywall.

About the Author

Stevie Donald has been an online writer since 2004, producing articles for numerous websites and magazines. Her writing chops include three books on dog care and training, one of which won a prestigious national award in 2003. Donald has also been a painting contractor since 1979, painting interiors and exteriors.