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Pthalo Blue (Red Shade)

Pthalo Blue (red shade) is a Series 2 transparent color. It has a masstone of a intensely deep rich blue, with a rich reddish blue undertone. This strong but transparent pigment is less strident in tints and glazes than the standard green shade. This color is available in 80ml, 250ml and 500ml sizes.

Color Detail

Masstone

Undertone

Blended with Titanium White

Washed with water

 
 

Color Comparisons

Comparing Blues

The top colour is the standard shade of Pthalo Blue which is the green shade, the second colour which looks very similar in masstone is the red shade of Pthalo Blue and when the two colours are tinted out and shown side by side it is easy to imagine how some artists might want to use both, and others might possibly change their choice of only one Pthalo Blue after seeing this comparison. If we move down from the red shade of Pthalo Blue we have Cobalt Blue which is much redder than the red shade Pthalo Blue when seen side by side, but the less well known shaded colour called Pacific Blue is much redder again to the point of being almost purple rather than blue and of course Ultramarine Blue sits somewhere in between these two. Most landscape artists would cross compare the pale tints of these colours when assessing what they might like to have on their palette for painting skies. The second swatch of four colours shows them diluted for glazing and the differences in the character of the the colour is easy to see. What is not really apparent on a computer screen is that Cobalt Blue has a sort of built in luminosity which is lacking in Cobalt Blue Hue and therefore true Cobalt Blue is sometimes used in an over painting layer over Cobalt Blue Hue.

The next chart shows the same four colours used as thin glazes. When seen applied as a glaze it is easy to see the difference between the two Pthalo pigments while Cobalt Blue which is a semi transparent colour is of course redder, and it does seem to have the ability to enhance the colour if true Cobalt is used thinly on top of Cobalt Blue Hue. The Pacific Blue which is a fairly opaque would not normally find much use as a glaze.

Pthalo Blue

Pthalo Blue Red Shade

Cobalt Blue

Pacific Blue

Pthalo Blue glaze

Pthalo Blue Red Shade glaze

Cobalt Blue glaze

Pacific Blue glaze

 

 
 

Color Information

  • Chemical Description: Organic
  • Pigment Type: Copper Pthalocyanine
  • Lightfastness: 1
  • Permanency: Excellent
  • Pigment Strength: Very Strong
  • Colour Index Name: PB 15
  • Opacity or Transparency: Transparent

Chroma is committed to the responsible use of art materials. Atelier is professional acrylic paint and not intended for use by children. Artists need to make personal decisions regarding the toxicity and dangers of the materials they use. Surface, temperature, humidity and paint application affect any paint’s performance.

Due to the individual nature of art, Chroma makes no express or implied warranties regarding the suitability of a particular paint for a particular situation. For detailed health and safety information, click here.

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