indigopurpurin ; indigo purpurin
红橙黄绿蓝靛紫 Colors of the rainbow ; Orange yellow purple indigo
靛紫红 indigopurpurine
硫靛紫红 b thioindigo maroon
溶靛素红紫 indigosol red-violet
红橙黄绿蓝靛紫，哦，太阳有七种颜色。
Red, orange, yellow, green, blue, indigo, purple. Oh, the sun has seven colours.
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