Affinity Designer colour picker giving wrong colour

[snizl]

I am using affinity designer on Mac and the colour picker does not do what it should.

See graph below. For the fill of the marked graph on the right I clicked on the fill of the graph on the left. The result is obviously not what I want.
What is going on here, and how can I fix it?

[MEB]

Hi snizl,
I'm getting correct results here. Do you mind attaching the afdesign file for us to check please? You can delete all other objects if you wish. Thanks

Are you using the color picker from the panels or the Color picker Tool?

[snizl]

Hi MEB,

thanks for the quick reply.
I am clicking on the graph on the right, having the fill selected on the righthand colourpane press i has the hotkey for the "Color Picker Tool" and then click on the fill of the graph on the left.

Interestingly, I now tested it and it does work if I select the stroke instead, or if I select the fill of a graph where the fill is selected as completely black.
I now have the feeling that there is some automatic adjustmend between stroke and fill is going on.

Untitled.afdesign

[MEB]

Hi snizl,
The issue is caused by the 50% opacity applied to the fill colour of both objects. When you copy the colour from the left object it copies the colour value it sees on screen - a medium grey taking the opacity value applied to the fill colour in consideration already (the original colour of this object with 100% opacity is quite darker). When you "paste" the medium grey colour on the right object the colour is pasted correctly (with the same values) but since this object also has 50% colour opacity applied (which is kept as an attribute) the pasted colour appears immediately even lighter. If you set the Fill colour opacity of the object on the right back to 100% you will see it matches the fill colour picked from the left object. See the attached clip it may help to understand:

 

Why not simply apply the grey you want directly to the fill colour of both objects without changing the colour opacity?

Note: The colour opacity is the value set on the bottom slider of the Colour panel (if it says Noise for you click the small colour well below it to switch to Opacity). Do not confuse Colour opacity with Layer opacity which is set on the top of the Layers panel.

[snizl]

Thanks a lot for the effort!
, that makes sense. The graphs were automatically created by a library I use for some analysis software, and I did not actually ungroup the adjacent dots from the graph, so I did not notice the opacity difference (if the grouped object is selected it hows 100% opacity). Alright, now I know what to look out for if I run into a similar problem again.