Inherited a set of these amber glass cups from my dude's great-grandma. I like them, they make me feel a little fancy, but I absolutely cannot gauge a steep color in these. I've got water as hardass as a Humphrey Bogart character, and it helps to glance at the color to see if I've got a decent steep, especially for herbal tisanes.
Welp.
Yup, perfectly clear glass or white teaware is the only way. I've got a bunch of fancy cups I never use because the white porcelain just makes everything easier lol