Mixing pastel colours was my challenge for the Powertex UK Design Team this month. I mixed pastel colours with Powertex Universal Medium for some simple Spring bottle vases. I like to mix my Powertex colours but it’s not familiar to everyone so here’s a short guide to mixing up your own Powertex colours!

Powertex colours are all mixable, the colours won’t split or separate. Mixing your colours will keep all the properties of Powertex too so it will still be weatherproof. It’s worth remembering that if you choose to mix Transparent Powertex with another colour it may lose it’s ability to be weatherproof!

Mixing your own colours will give your projects a whole new look. You may want a turquoise green for an outdoor sculpture or a deep purple for a gift box. It opens up new possibilities for your creations and your artwork.

Mixing colours with Powertex

Mixing colours with Powertex

I made rainbow fairy houses but you might just need a luxurious purple for your latest make. Imagine how your canvas art can be transformed with a bright texture layer.

Powertex fairy houses by Kore Sage

Powertex fairy houses by Kore Sage

The basics

I’m mixing my colours from Red, Blue and Yellow Ochre Powertex Universal Medium.

  • Red and Yellow Ochre make Orange
  • Blue and Yellow Ochre make Green
  • Red and Blue make Purple

Using more of one colour than the other will change your result as the chart below shows. 

Powertex Colour mixing wheel swatches

Powertex Colour Mixes

This is a very simple colour chart, there are of course endless shades to mix. I mixed two colours with each combination as I’ve explained below. You can use this chart for your own reference but remember that my photo and the computer screen may not show the colour exactly as it was!

Mixing Purples

Mixing Purple with Powertex

Mixing Purple

This has to be my favourite! Powertex mixes delicious purples like these. Start with either red or blue and add a little of the other colour at a time until you get a shade you like. See the more “dairy milk” purple is mostly blue with a little red. The yummy “berry” purple is more red with a little blue.

Mixing Orange
Mixing orange with Powertex

Mixing Orange

You will only need a tiny amount of red to make the Yellow Ochre turn Orange! Adding Yellow to red has much less effect. When mixing anything with a lighter colour, always add a tiny amount of the darker colour at a time. In this case, adding a little red to the Yellow Ochre has darkened it a lot. It’s possible to get a much more “yellow” mix than this.

Mixing greens

Mixing green s with Powertex

Mixing Green

You can buy Green Powertex but if it’s not a colour you use often, you can mix it with Blue and Yellow Ochre. Start with your yellow and add tiny amounts of the blue until you have a colour you want. The colour will change from a leafy green to a rich turquoise. You can also lighten all your mixes with Ivory if they are too dark, just add a tiny amount at a time.

Powertex will stay workable for about an hour so you have plenty of time to mix and use your colour. Use your new colours as usual to create your textures and then highlight with metallics or light pigments. The rainbow houses were dry brushed with pearl pigments to show off their colours.

Powertex row of fairy houses

Powertex row of fairy houses

Pastel colours are created in the same way using Ivory. If you’re looking to move on from basic techniques, mixing your colours could be a great way to experiment!

If you’re new to Powertex, you might find my beginner’s blogs useful. If you’re looking for project ideas the Powertex UK Design Team publish regularly at the Powertex UK Mixed Media Magazine


Powertex Rainbow Fairy Houses - blog - Kore Sage Art · 4th August 2019 at 3:30 pm

[…] secret to these coloured fairy houses is mixing Powertex colours. I’ve written an article on mixing Powertex colours which could help you if you’re new to mixing […]

5 Powertex projects for beginners - Blog - Kore Sage Art · 27th October 2019 at 7:07 pm

[…] Find out about mixing Powertex colours. […]

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