Cobalt Blue
Inorganic - Introduced at about the same time as Ultramarine, Cobalt Aluminate is a synthetic, inorganic pigment. It is more greenish-blue, with a heavier, more mineral appearance when seen as a dry pigment. The hues formed from it are correspondingly heavier and greyer. But it has a certain shade that the less expensive ultramarine cannot quite match. The paint film, when cured, is quite soft.
Cobalt Blue is a single-pigment Michael Harding oil colour made with PB28 (Inorganic).
It is semi-opaque, excellent lightfastness, very fast drying time, average tinting strength.
It is ground in linseed oil with average oil content.
- Code
- No. 506
- Series
- Series 5
- Pigment Index
- PB28
- Pigment Type
- Inorganic
- Oil / Vehicle
- Linseed Oil
- Sizes
- 40ml · 60ml · 225ml, 1L, 2.5L, 5L
- Lightfastness
- Excellent
- Opacity
- Semi-Opaque
- Drying
- Very Fast
- Oil Content
- Average
- Tint Power
- Average
- Toxicity
- Non-Toxic
Measured colour data
Loading measured pigment data…
Tint · Tone · Shade · Glaze
Preview how Cobalt Blue behaves when mixed, toned, shaded and glazed. Each swatch is computed from the masstone using a perceptual subtractive model - an approximation for guidance, not a formulation guarantee.
Cobalt Blue straight from the tube.
A thin wash over white.
Mixed with Titanium White.
Mixed with a mid neutral grey.
Darkened with a chromatic black.
A thin transparent film over white.
Popular combinations
Open Cobalt Blue in the Virtual Mixing Studio to preview how it combines with these partners before you reach for the palette.
Open Cobalt Blue in Mixing StudioFeatured in 3 palettes
What pigment is used in Cobalt Blue?
Cobalt Blue is made with PB28.
Is Cobalt Blue a single-pigment colour?
Yes. Cobalt Blue uses a single pigment (PB28), so its behaviour stays consistent and predictable on the palette.
Is Cobalt Blue transparent or opaque?
Cobalt Blue is semi-opaque.
Is Cobalt Blue lightfast?
Cobalt Blue has excellent lightfastness.
Is Cobalt Blue vegan?
Yes. Cobalt Blue contains no animal-derived ingredients and is suitable for vegan artists.
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Colour Disclaimer: Colours shown on screen or in print may vary from the actual product. For the most accurate representation of colour, texture and finish, we recommend viewing a physical sample or swatch in person before making your final selection.