Add pink to the room's theme for a look that is strongly feminine. Black and pink work well, regardless of the pink's hue. Fuschia creates a bold look, while a soft pink is more delicate. Use pink bedding, throw rugs, curtains and accent pillows to complete the look. For an older girl, paint the walls black and add bright pink flowers or lips all over the walls using stencils or vinyl decals.
Combine purple with black for a feminine but not too "girly" bedroom. Use a light mauve for a softer look or a dark bold purple for older girls who want an edgier style. Add some white to the overall look when using a dark purple. For example, paint two walls dark purple but stencil a large tree silhouette over the purple in a stark white or cream. Paint the remaining two walls a cream color. If you use a light purple, add silver accents to the finished look through lamps and trims.
Use red with black on a limited basis. Because red is a primary color, it is a bold choice. This makes it an overwhelming option. Use it lightly for young girls. For example, paint only one wall red but use a white bedspread and red accent pillows on the bed. Add a white throw rug and red curtains to finish the room. Dark reds or all red walls work better for older girls. Ladybug-themed rooms can also work well with this color scheme for younger girls.