Which type of contour line is most suitable for light readable maps?

Red brown contour lines are particularly well-suited for light-readable maps because they provide a clear visual contrast against typical map backgrounds, which may often be white or light-colored. The red brown hue strikes a balance, ensuring that the lines are visible without being overly dominant, which can occur with darker colors like brown or green. This enhances the overall readability of the map, allowing users to easily interpret the elevation and terrain features without confusion or distraction from the contour lines themselves.

In contrast, brown contour lines might blend too closely with traditional map colors, making them harder to discern. Similarly, while red can be vibrant, it may draw too much attention or be mistaken for other elements on the map. Green is often used to represent vegetation or other land cover and could detract from the contour line's role in indicating elevation changes. Thus, red brown contour lines provide an effective balance for clarity and functional readability in maps.