Singer Kesha has an unusual method for choosing what hue to dye her hair. She opts for colour wheel to choose the next trend for her tresses.

The 27-year-old singer posted an image of the pocket colour wheel to photo sharing site Instagram this week along with the caption "hair dye party what color will it be tomorrow ?????" before stepping out with newly dyed blue hair, reports contactmusic.com.

The Instagram image did give fans a hint as to her choice as splatters of blue dye could be seen on the wheel.

Earlier, she had dyed her hair pink and green following a rehab stint in January.