Mix colors

[Renaki_022]

Hello everybody... I would like to mix two colors in Affinity Publisher or Affinity Photo... 

For example yellow and blue and be able to see at the intersection of this two blocs, the color green ... what should I do? Thanks rené

[Renaki_022]

... like this style, see the attached file... thanks rené

[GarryP]

You can use Blend Modes to mix colours (red arrow in attached image).
You can also change the Blend Ranges/Options to adjust what happens (blue arrow).
The Help will tell you how to use both.

[Renaki_022]

Thank You very much Garry... I have search a lot of time... Ufffh...   renek

[firstdefence]

Mixing colours really depends on the specific colours selected so a strong blue like RGB 0,0,255 will dominate a strong yellow RGB 255,255,0 and you will probably end up with grey, but RGB 0,128,255 and RGB 255,255,0 will get you a green, so mixing colours isn’t as generic as blue + yellow = green 
See image below...

Strong blue vs lighter blue, both blended with a strong yellow.

…and blended with the smudge tool (B)

A few online colour mixers to play with...

https://trycolors.com

https://colordesigner.io/color-mixer

[walt.farrell]

3 hours ago, GarryP said:

You can use Blend Modes to mix colours (red arrow in attached image).

Yes, but the effect seems rather random (to me) and if you're expecting something specific like yellow + blue = green it may take some experimenting.

For example, for yellow + blue = green the Vivid Light blend mode kind of works. But for yellow + red = orange you need Average to get a result kind of like you want.

[h_d]

Red, blue and yellow, as in @Renaki_022's example, are primary colours in terms of pigments and painting on paper, but not on computer screens.

On computer and TV screens, based on the light receptors in the human eye,  the primary colours (aka additive primaries) are red, blue and green, as in @GarryP's example.

(The subtractive primaries cyan, magenta and yellow are used for colour printing - along with black.)

Colour theory is a huge subject, but basically mixing colours on a computer screen doesn't work in the same way as it does on paper, and the only way to achieve the 'on paper' colour wheel in the OP's request is most likely going to be to create a complex shape with a separate fill for each segment. (Try mixing yellow and blue on screen to achieve green, for example, using any blend mode.)

[walt.farrell]

2 minutes ago, h_d said:

Try mixing yellow and blue on screen to achieve green, for example, using any blend mode.

Vivid Light is as close as you'll get, and it is a green, though perhaps not the right green

[h_d]

Out of interest how are you achieving that Walt?

I get this (with both yellow above blue and blue above yellow), top layer set to Vivid Light, bottom layer set to Normal in both cases:

(Affinity Photo Beta for Mac 1.9.0.199)

[Renaki_022]

Thank's to everybody... Interesting sujet...  renek

[walt.farrell]

6 hours ago, h_d said:

Out of interest how are you achieving that Walt?

Just like you did, though perhaps with different Blue and Yellow. I'm using an RGB document, so I just chose approximate colors from the color wheel.