从最便宜的廉价航空公司到世界上最大的航空公司，我们可以看到：全球的航空公司都在他们的机舱座椅上融入了各种深浅不一的蓝色，这并非巧合。
It can be seen from the cheapest budget airlines to the world's largest carriers: Airlines across the globe integrate various shades of blue in their cabin seats, and it is no coincidence.
一般来说，蓝色和紫色是设计中用起来最放心的颜色。
Generally speaking, blue and purple are the safest colours to use when you design.
蓝色盲：这是一种最罕见的色盲，不到0.3%的男性和女性患有这种色盲。
DeuteranopiaProtanopiaTritanopia: The rarest type of colour blindness, it affects less than 0.3% of males and females.
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