The colours are chosen according to mass tone (colour from tube), undertone (bias of colour when in a thin film), colour strength, relative opacity
Winsor & Newton : Professional Watercolor : Lightweight Metal Sketchers Box : 5ml : Set of 12
Winsor & Newton Windsor & Newton Artist Watercolor 5ml 24 Color Set
Cotman Watercolour Set Winsor & Newton - Flipboku Shop
Made in England by Winsor & Newton for over 100 years, these fine watercolors are unmatched for purity, quality and reliability. Made with maximum pigment content to achieve the highest tinting strength. 5ml tube.
Winsor & Newton Professional Watercolor - Burnt Sienna, 5 ml Tube
Spotlight on Cadmium-Free Colours
Winsor & Newton Professional Watercolours (Part 1) - Yellows & Oranges
Should I Choose Watercolor in Tubes or Pans? The Beginner's Conundrum — Katia Galante Art
Winsor & Newton Professional Watercolor - Winsor Red, 5 ml Tube
Watercolour Sets
Winsor Newton Professional Watercolour Gwartzmans – Gwartzman's Art Supplies
Professional Watercolor - Cadmium-Free Yellow, 5 ml
Winsor & Newton Professional Watercolor - Winsor Blue Green Shade, 14ml Tube
Winsor and Newton Professional Watercolors — Greenville Arms 1889 Inn
Winsor & Newton Cotman Watercolors - Set of 24 – The Postman's Knock