Centrioles don't have a single, definitive color. Their color in microscopy images depends entirely on the staining techniques used. Various research papers illustrate this.
Several sources show centrioles depicted in different colors:
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Green and Blue: Some studies show centrioles visualized as green and blue. This is likely due to specific fluorescent dyes or labeling techniques used in the experiment. [Reference: After cell division, each cell has one centrosome that contains two centrioles (green and blue). The centrioles separate during the G1 phase. During S phase, a 'procentriole' (light green and light blue) forms at each centriole.]
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Magenta: Other research depicts centrioles in magenta. Again, this is a consequence of specific staining procedures. [Reference: (D) Fixed NB showing that Cnn (green) is restricted to one of the two centrioles (magenta).]
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Red: Another study uses red to highlight a specific centriole, while the other is shown in grayscale. [Reference: The figure depicts the centriole's initiation and maturation with a single centriole highlighted in red in relation to the other centriole in grayscale.]
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Dark and Light Green: Differentiation between a mother and daughter centriole can be shown using shades of green. [Reference: During the first meiotic division, pairs of centrioles, each containing a mother centriole (dark green, bearing appendages) and a daughter centriole (light green)...]
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Orange: Some images utilize orange to show centrioles. [Reference: Arl13b+ apical primary cilia (arrowheads) and CM (white, black and purple arrows), as well as the centrioles (orange arrows) are indicated.]
In short, the "color" of a centriole is an artifact of the visualization method used in microscopic imaging and not an inherent property of the centriole itself.
