The term 'tawny-coloured' generally refers to a warm, golden-brown hue with hints of orange or yellow. Some synonyms for this shade might include amber, honey, caramel, saffron, or russet. Similar shades of brown might be described as chestnut, mahogany, sepia, or cocoa. Other words that could be used to describe a warm, earthy tone might include ochre, rust, copper, or burnt sienna. Depending on the context, words like warm, golden, or sun-kissed might be used to describe the overall effect of this color, which can evoke feelings of comfort, warmth, and familiarity.