I like your design more than stock, but the maximum opacity is lower, specifically on the inserter arrow indicators.

rgba set to 255/255/0/255, the yellow inserter indicator is more transparent/less opaque than the original inserter color, which is a little harder to resolve. Would it be possible to use set the original opacity as the max, or just allow a = 255 to be totally opaque?

(I would recommend keeping the default inserter color yellow: it's a better default for color blind players)

Also, less important, but fluid arrows are unchanged. Maybe that was a choice, but it would be nice to have them all match your style.

https://ibb.co/PGDzVCBf