Your accent chair will be the central point of your room, so deciding on a color that works well with the rest of the room is crucial. Some people opt to match their accent chair to the colors in the room, while others prefer a different, yet still complementary color for their chair.
If you want the chair to blend in seamlessly with the existing color scheme of the room, choose something neutral like different shades of white, black, or brown.
If you want the chair to stand out and be the immediate focal point of the room, go for a color that does not appear in the room often, or a color that directly complements the main color scheme. Examples of complementary colors include red and green, yellow and purple, and blue and orange.
Regardless of how neutral or bright the color of the accent chair will be, it will look best if the color also appears in at least 1-2 other places in the room (e.g. a set of pillows, a rug, or even an accent wall) so that the chair is not a complete anomaly.
If the room is relatively muted or monochromatic, go for an eye-catching pattern or bright color to liven it up a bit.
If the room is full of different patterns, opt for a more simple, plain piece to avoid clashing with other aspects of the room.