OpenLayers vector WMS tiles

Uses the option zoomadjust=2 to fetch a more detailed grid level than the default.

Click cell, get plus code

OpenLayers image TMS tiles

Uses the options linecol=0xff0000ff&labelcol=0xff000060 to set the lines to red and the labels to a non-opaque red.

Leaflet image TMS tiles

Google Maps API image WMS tiles