Talens - Ecoline Liquid Watercolour Ink- Sky Blue Light 30ml. This Ecoline Liquid Watercolour Paint comes ready to brush straight out the jar so you can get creative and produce your own artworks right away. It delivers watercolour results without the need to mix with water and can be used on watercolour or drawing papers. You can use them alone for illustrations and more, or mix them with other paints to create impressive mixed media art. The bottle contains 30 mL. This paint is sky blue light colour and can be known by the number 551.