WatercolourPB28
PB28
Cobalt Blue
W411 · Series 4
WATERCOLOUR
Series 4
Cobalt Blue No. W411
Pigment HistorySynthetic mineral - discovered by Thénard in 1802. A favourite of the Impressionists and Post-Impressionists - Monet and Renoir used it for skies and shadows where ultramarine read too warm. A clean, reliable, mid blue - stable in all conditions, though it requires care because of its cobalt content.
Technical Summary
Cobalt Blue is a single-pigment Michael Harding watercolour made with PB28.
It is semi-transparent, excellent lightfastness, non-granulating, medium staining power, tinting strength 3.
- Code
- W411
- Series
- Series 4
- Pigment Index
- PB28
- Contents
- 15ml tube
- Lightfastness
- Excellent
- Tint Power
- 3
- Granulation
- NO
- Staining Power
- Medium
Colour Science
Measured colour data
Loading measured pigment data…
Pigment Behaviour
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.
Masstone
L 35.61 · a 9.12 · b -56.41
6.11PB 3.6/13.2
Cobalt Blue straight from the tube.
Undertone
#c0e3f5
A thin wash over white.
Tint
#3e93d2
Mixed with Titanium White.
Tone
#2c6b9a
Mixed with a mid neutral grey.
Shade
#0c4072
Darkened with a chromatic black.
Glaze
#95cded
A thin transparent film over white.
Compare Cobalt Blue
Compare with nearby colours
See Cobalt Blue side-by-side with its closest neighbours in the range — chemistry, opacity and lightfastness at a glance.
Mix with Cobalt Blue
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 Studio Palettes featuring Cobalt Blue
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Where to buy
Cobalt Blue
Available from 114 verified stockists worldwide
- Above Ground Art SuppliesVisit store · 74 McCaul St, Toronto, Canada · store.abovegroundartsupplies.com
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Cobalt Blue: Questions & Answers
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-transparent.
Is Cobalt Blue lightfast?
Cobalt Blue has excellent lightfastness.
Does Cobalt Blue granulate?
In watercolour, Cobalt Blue is non-granulating.
Does Cobalt Blue stain the paper?
Cobalt Blue has medium staining power.
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.