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.

Color values:

RGB: #e40045 on #303c49

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

enter image description here

enter image description here

  • 2
    Hi. It is unclear whether you're creating the effect in Illustrator or in Indesign. In case you did it in Indesign, you can change Transparency Blend Space to RGB: Edit > Transparency Blend Space. Be aware this will affect the whole document though.
    – Vinny
    Commented Oct 22, 2018 at 6:51
  • Thanks for this tip. I will try this and have a look at the printer’s results.
    – Lars
    Commented Oct 22, 2018 at 10:37
  • 1
    Thanks again. The trick with Blend Space was a good solution!
    – Lars
    Commented Oct 23, 2018 at 15:04

1 Answer 1


A solution could be using a rich black and a fake rich magenta in a blend behind the magenta shape:



Top Shape

Top shape



Add after the question edit

It's obvious that if you want to get a good result you must create another color since the colors you are using have very different proportions of CYAN and BLACK; and knowing that none of the blending modes offers a good result.

One approach is to create blends between the base colors to their own light, 20% ink and blends of the resulting colors. This is to get a color that has the intermediate proportions of the absent CYAN and BLACK inks.


Using the resulting color highlighted in the previous image, 47/49/26/57 we get a cyan and black percentage. Increasing the magenta to bring it closer to the top shape color and reducing the cyan:

  • From 47/49/26/57 to 30/75/26/60

The result is:

enter image description here

  • Thank you for the suggestion. Unfortunately I did’t clarify enough: the color values I used are specific brand colors. I can’t change them that much. They are defined as the following: RGB: #e40045 on #303c49 CMYK: 0/100/60/0 on 63/32/14/76
    – Lars
    Commented Oct 22, 2018 at 10:40
  • I was able to recreate the blends and got the same color value “47/49/26/57”. It is also clear to me why you increased the magenta. The only thing I am missing right now is how you apply the new color. If I create a shape with a 0/100/60/0 fill and the outer glow set to 30/75/26/60 and place it on the blue background it doesn’t look like your screenshot. It’s quite dull. Are you creating some additional squares underneath?
    – Lars
    Commented Oct 22, 2018 at 13:55
  • I didn't use the outer glow. It's the blend from the blue to the new color and the magenta shape over, like the first part of the question.
    – user120647
    Commented Oct 22, 2018 at 14:14
  • Thanks again. I got it to work and the printing result is satisfying. But for this projects the option described below my question by @Vinny was more suitable.
    – Lars
    Commented Oct 23, 2018 at 15:07

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