I used Saber effect for my Black png logo. Cant see black glow effect

[Rolex96]

I used Saber effect for my Black png logo. I changed the Composite settings of the saber effect to Transparent, So I could see the white White background. I wanted the Glow color to Black. But I don't see the effect when I change the colour to black. I could see other colours not the black colour. Someone please help me since I am new to this. Appreciate in advance. 

here posted both screenshot with black and  blue glow colour effect. Please guide me.

[Mylenium]

Glow effects liek Saber assume belnding modes like Screen or Add, which effectively eliminate anything that is black. You may simply have to work around that by coloring the glow effect with Tritone, Tint, Colorama or whatever.

Mylenium