The emissive color didn't appear in game.

When I followed the totorial about set up a power up game.
I applied the dynamic color to my hero. The base color will chang with power level.
And in the viewport, the emissive color changes too. To glow, something like that.
But in the game, no emissive color can be seen.
My engine 4.7.6

Any help will be great.
Thanks.