Grumbacher Pretest Oil Cobalt Blue Deep 37ml

Far more muted than traditional Cobalt, Cobalt Blue Deep is also redder in tone. It’s a semi-transparent color that works well for glazing and deepening tones in mixes. It has a moderate tinting strength and takes on a smoky quality when mixed with white, which can be ideal for sky-work. Introduced to the Pre-tested Professional line in 2014.