Why do flowers have different colours?

唔同既花會用唔同既方法吸引昆蟲
咁唔同既花就會用唔同既顏色去吸引昆蟲
and 花生長係唔同地方 咁吸收到既element都唔同
咁佢做出黎既pigment會隨佢吸到既metal ion有關

Most plants possess several pigments, e.g. carotenoids, xanthophylls, etc., besides chlorophyll. When there is no chlorophyll in a plant, other pigments become exposed and seen. Also, light stimulates plants to produce chlorophyll.So the flowers have different colours

唔同既花會用唔同既方法吸引昆蟲
咁唔同既花就會用唔同既顏色去吸引昆蟲
and 花生長係唔同地方 咁吸收到既element都唔同
咁佢做出黎既pigment會隨佢吸到既metal ion有關

It is beacuse different flowers have different pigment. Pigment will effect the colour of the flower directly.