Colours play an important role in conveying the mood or feeling of a painting. Bright, warm colours like yellows and reds often give a happy mood, while cooler colours like dark blues and purples can give a sad or angry mood. The document lists several Irish paintings and artists, including A Convent Garden by William John Leech, A Connemara Village by Paul Henry, and Hellelil and Hildebrand, the Meeting on the Turret Stairs by Frederic William Burton.