Psoriasis and Joint Pain. If you have psoriasis and have experienced pain, stiffness, or swelling in and around your joints, you may be experiencing symptoms of a psoriasis-related disease called psoriatic arthritis, or PsA. PsA is a chronic inflammatory disease that affects both your skin and your joints.
There are seven colors in the rainbow: red, orange, yellow, green, blue, indigo and violet. Roy G. Biv. Portrait of Sir Isaac Newton by Godfrey Kneller. Awesome rainbow hairstyling courtesy of Azael Carrera.
Orange and violet (purple) are the other hues, for a total of six, as in the rainbow: red, orange, yellow, green, blue, violet. The other color appearance parameters are colorfulness, chroma, saturation, lightness, and brightness.