Deep Glow is famous for its "edge colors." You can get this for free using the Quick Chromatic Aberration plugin from Plugin Everything . It adds those realistic color fringes to your glow. VinhSon Nguyen’s "Better Glow" Preset:
Presets use built-in After Effects tools but are pre-configured to mimic the high-end look of Deep Glow: deep glow after effects plugin free
However, if you are looking to achieve that high-end, physically accurate glow without spending money, there are several legitimate ways to do it. Below is a guide on why Deep Glow is popular and the best free alternatives to get that same look. Deep Glow is famous for its "edge colors