This was a fashionable colour despite its price tag. Mrs Delany, the 18th century writer, records having her English room "painted a sort of olive for the sake of my pictures".Little Greene Child Safe, Ecological & Sustainable National Trust Paints. Inspiring rich sumptuous colour combinations with high coverage rates. Choose from a wide range of Heritage Colours for the 21st Century, with new Grip Technology and excellent adhesion to most surfaces, no primers required.