Studies on the effectiveness of cranberry juice for preventing or treating UTIs have produced mixed results. The red berry contains a tannin that prevents E. coli bacteria - the most common cause of urinary tract infections - from sticking to the walls of the bladder, where they can cause infection.
primary color for pigments - any of three pigments from which all colors can be obtained by mixing; the primary colors for pigments are red, blue, and yellow. primary colour for pigments. primary color, primary colour - any of three colors from which all others can be obtained by mixing.
The primary colors of light are red, green, and blue. Red, blue, and green are the primary colors of light. Mixing these colors can produce all of the colors of the spectrum. The complementary colors are cyan, magenta, and yellow which are formed by combining the two adjacent primary colors. Red and blue make magenta, blue and green make cyan, and red and green make yellow.