Horned frogs shoot blood from their eyes. I bet the red is some take on that.
Yep, it was more subtle the first time they used red.
https://gofrogs.com/news/2009/11/10/TCU_to_Debut_NIKE_Pro_Combat_Uniforms_on_Saturday.aspx
"The red lines down the center of the helmet represent the blood that shoots from a horned frog's eyes when under attack"