Artificial Speed Force

The Artificial Speed Force (ASF) was a replacement for the Speed Force after its death.

History
During the Crisis. The Spectre gave Barry Allen a boost to enter the Speed Force in order to travel to the Dawn of Time. After the Multiverse got restored, Wally West felt something wrong and returned to Central City to talk to Barry, only to know that he suffered from a few "hiccups" while accessing his speed. Later, they entered the Speed Force to talk to them and realize that the Spectre energy unbalanced the nature of the Speed Force and caused its "death". After the death, Barry and the other speedsters started to lose their speed which caused Barry to begin to build an artificial Speed Force.

Creation
"You remember how Thawne used negative emotion to stabilize his Speed Force machine? Well, since we didn't wanna make the same mistake, we used an inert substance, an argon-xenon hybrid that would generate no emotional fallout. But I think that was a mistake. Yes, the ASF gave you increased cognitive function, a thousand times over, but... it's done the exact opposite to your emotional response."

- Cisco on the creation of the ASF

Yellow and Orange
After the ASF was activated, Barry regained his speed and has yellow and orange lightning like his original connection with the Speed Force.

Blue
When Barry destroyed the ASF, he was hit with blue lightning from within his body.

Eye
Having connection to the Artificial Speed Force allows the speedsters to have lightning flicker or glow in their eyes. The colour of the eye is nearly identical as their lightning color.