Mixed stroke colors become white when changing fills using CMYK spectrum in an RGB document
There is a way to make objects loose their stroke colors in specific conditions.
1. Create an RGB document
2. Create two shapes
3. Make them have same fill color, but different stroke colors
4. Select both
5. In Control panel Shift+click the arrow button next to the fill chip, to call the alternate UI with sliders and spectrum instead of Swatches view
6. In this dropdown panel’s menu pick CMYK
Strokes become white.
This does not happen if the color mode in this panel is left RGB or HSB.
Also, strokes become white if you pick a color in an RGB/HSB spectrum first and switch to CMYK in this menu after, or just click the spectrum with CMYK already chosen.
Also it does not happen if strokes have the same color, only when they differ and mixed stroke chip is displayed ([?]).
Please take a look at the GIF attached and try it yourself, using the attached test file.
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You don’t have to use dropdown panels, you can use just Color panel for that, same results.