Closest hex to #77ffff is #7ff

Minify your CSS by half!

#
#7ff

77ffff

77ffff

contains 7f

07f 17f 27f 37f 47f 57f 67f 77f 7f0 7f1 7f2 7f3 7f4 7f5 7f6 7f7 7f8 7f9 7fa 7fb 7fc 7fd 7fe 7ff 87f 97f a7f b7f c7f d7f e7f f7f

contains ff

0ff 1ff 2ff 3ff 4ff 5ff 6ff 7ff 8ff 9ff aff bff cff dff eff ff0 ff1 ff2 ff3 ff4 ff5 ff6 ff7 ff8 ff9 ffa ffb ffc ffd ffe fff

contains 7f

07f 17f 27f 37f 47f 57f 67f 77f 7f0 7f1 7f2 7f3 7f4 7f5 7f6 7f7 7f8 7f9 7fa 7fb 7fc 7fd 7fe 7ff 87f 97f a7f b7f c7f d7f e7f f7f