I noticed that changing the colour of the wicks through TradingView settings changes the colours of both the top and bottom wicks. I also noticed that the thickness of wicks couldn't be changed either so they remained very hard to see when zoomed out of charts. Wicks have the potential to show zones where price rejects from - this is useful for identifying potential support and resistance zones.
I created an alternative solution to this problem by creating bodies for the wicks. It's recommended that you hide the wicks so it shows candles as bars split into 3 segments (top segment representing top wick; middle segment representing candle; bottom segment representing bottom wick). Colours are customizable. Also includes borders for the wick bodies.