Red and orange dominate the collection, while both blue and green are only available in three albums.

書脊的顏色

The "Tintin and the Picaros" Album is the only one with a yellow spine.

書脊有五種不同的顏色： 紅色、橘色、藍色、綠色和黃色

In Germany, for example, all of the comic spines are red.

紅色和橘色最多　藍色和綠色各有三本

And in Spain all of them are yellow.

《丁丁和叢林戰士》 是唯一有黃色書脊

Yet, China, Japan and many other countries follow the same pattern as the French language original with it's five different colors.

像是在德國　全部的書脊都是紅色的

But what do they mean?

在西班牙都是運用黃色書脊

One thing that seems to make sense is that the color of the spine is of high contrast to the colors of the album's front cover.

然而　中國、日本和很多國家都是仿照法文書脊版本的顏色

It is also noticeable that those comics with a similar front cover design often have the same spine color.

那它們有什麼意思？

Yet, the most plausible theory is that the colors come from the early albums that used cloth to bind the album spines

看起來合理的是　書脊的顏色都與封面顏色有很強烈的對比

which had no printing on them.

也可注意到有些封面顏色相近的漫畫時常會有相同的書脊顏色

Back then they had to use what colors were available, which were mainly red and orange.

最合理的是　各個顏色的來源都是沿用以前用布綑綁的顏色

This explains the dominant spine colors for the Tintin albums.

且書名沒有列印在書脊

The colors decided for the final printed versions, including blue, green and yellow

那時候他們只能利用可得到的顏色（大部分是紅色與橘色）

seems to be traced back to the collections publisher.

這解釋丁丁歷險記出現最多書脊的顏色

Although a special pattern for the use of the colors seems unlikely.

最後印刷的版本顏色（包含藍色、綠色和黃色）