Outer glow CMYK vs RGB

[apfelartig]

I am creating this graphic in Illustrator and InDesign. It is using an outer glow with the same magenta color as the fill of the shape. Normal blend mode 100% opacity.

I would like to get a similar glow result in CMYK as I get in the RGB version. I do know there are significant differences in the RGB and CMYK color spaces.

Still I was hoping there might be some tricks to achieve a less white glow.

I already found this thread. But unfortunately the solution isn’t working since I don’t have a black background.

[jdanek]

What color is your background?  Cannot really make a recommendation without knowing that.  I would experiment with different Blend Modes to see what works better.  You say 100%, but against what color?

[apfelartig]

Yes sorry for leaving that out:

RGB: #e40045 on #303c49

CMYK: 0/100/60/0 on 63/32/14/76

[q3player]

Need to mention that 63/32/14/76 is not really black but merely a dark blue.

[apfelartig]

Yep, I know but I never intended it to be black. It is a dark blue as seen in my screenshots and it has to be this particular blue.

As these are brand colors I can just slightly alter them to achieve a better glow.

[jdanek]

I wonder if you could create two glows ( the first one would be White which knocks out of the Dark Blue, then a second that consists of your Red set to either 100% or Multiply ).  The other option would be to try some of the other Blend Modes on your original Glow.

[apfelartig]

I tried that already and it makes the color of the glow just a little bit brighter but doesn’t knock out the dark blue.

[q3player]

As you can see in the separation tables you will never get a good result.

[q3player]

If you create a white object that knocks out the background the result will be white. If you put a red radient (red to white) upon this you can use normal or multiply as blend mode with all the same results because your background is white.

[q3player]

If you could change your background to 0/100/60/100 you will see the desired result.

The outer glow creates a gradient form the background color to your object's color.

Your object has no C and no K but full M and a lot of Y.

Your background has lots of C and K but only little M and Y.