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The color of the spheres indicates the order of the de Boor points : the first point is blue , and the last is red , while intermediate ones have colors in-between blue and red . This explains how everyday objects ( plants , clothes , Coke cans ) have colors . Sexual Selections exposes the anthropomorphism and gender politics that have colored our understanding of the natural world and shows how feminism can help move us away from our ideological biases . The clip art may have color added to it only if the same color hues as represented in the poster , bookmark , and certificate are utilized . Textblocks can contain images and links , and have colored texts and backgrounds . The other pictures did not have color , but he will put some color on " Frederic playing the flute . If you have color slides , you might prefer to load them on the PC in the classroom or place them on a web-site and access them through a browser . The color of the spheres indicates the order of the control points : the first control point is blue , and the last is red , while intermediate ones have colors in-between blue and red . Here is a little magnet , and I have colored the ends differently , so that you may distinguish one form the other . Some of the most beautiful pieces have colored porcelain baked onto the clay in flowery designs .