How is color highlighted in the poem and why? List all the words in the poem that suggest color.

The various colors highlighted in the poem exemplify the difference between the landlady and the poet, based on the skin-color of both. The use of the color red is magnified to explain the various things which are red in color like the telephone booth, the double-tiered bus and the pillar-box. It explains the color of the dark-skinned poet who was not fair-complexioned like the landlady on the other side of the line. The expression 'gold-rolled' shows the elite class to which the 'fair-skinned' people are said to belong. 

Various colors which are used in the poem are: Red, Black, Gold, milk chocolate, brunette and blonde.