Use clear, distinguishable colors for lines
Summary: Avoid ambiguity and over-design. High contrast matters.
Use clear, distinguishable colors for lines
Why this matters
Maps often become a mess of similar shades (teal vs. turquoise). For colorblind users or in poor lighting, these are indistinguishable.
Principle
Stick to primary, distinct colors first. Pattern or texture can be added for secondary differentiation, but color alone should be bold and unambiguous.