这是倒装结构,强调后面的his first concern with the question of colours,原句应为His first concern with the question of colours was also noted,译为,同样,他也强调指出了自己对于颜色问题（种族问题）的关心.
注：括号里要看上下文,没特殊要求就是颜色,如果是政论文或者时文很可能是种族