Also, <style> @media (prefers-color-scheme: dark) { .line { stroke: #eed; } rect, circle, polygon { fill: #eed;

Also, <style> @media (prefers-color-scheme: dark) { .line { stroke: #eed; } rect, circle, polygon { fill: #eed; stroke: #eed; } } </style> is valid SVG, and would fix the issue.