Today I learned that English doesn’t have an equivalent to the French world "bleu-vert" literally "blue-green" and meaning a colour in between blue and green so that it can’t be easily classed in either one (that’s not exactly like cyan which exists in French but is a precise color). Sixty percents of the time I was thinking "in between".
Amusingly, the dictionary tells me that teal is a dark bluish-green which both tells me that teal is not an exact translation but that bluish-green would be.