TerraMap Windows is an interactive Terraria v1.4 world map viewer that loads quickly and lets you pan, zoom, find blocks, ores, items in chests, dungeons, NPCs, etc.
Yeah, highlighted tiles with dark colors can be hard to spot. For these, you can use the Previous and Next Match buttons, or change the highlight overlay color to white, and adjust the slider:
For example statues(Pigron, Heart, etc). https://i.imgur.com/fkYu3YC.png Maybe add some outline?