It is not necessary to dilute Aqueous Hobby Color for brush painting as a basic rule, but if using an airbrush to spray Aqueous Hobby Color, dilute the paint with 100 to 150% Mr.Aqueous Hobby Color Thinner (T-110 0r T-111).
Mr Hobby Aqueous Hobby Color Grayish Blue FS35237 (US) - H337 is ideal for projects requiring a grayish blue color liquid for model painting.