Closest hex to #30b301 is #3b0

Minify your CSS by half!

#
#3b0

30b301

30b301

contains 3b

03b 13b 23b 33b 3b0 3b1 3b2 3b3 3b4 3b5 3b6 3b7 3b8 3b9 3ba 3bb 3bc 3bd 3be 3bf 43b 53b 63b 73b 83b 93b a3b b3b c3b d3b e3b f3b

contains b0

0b0 1b0 2b0 3b0 4b0 5b0 6b0 7b0 8b0 9b0 ab0 b00 b01 b02 b03 b04 b05 b06 b07 b08 b09 b0a b0b b0c b0d b0e b0f bb0 cb0 db0 eb0 fb0

contains 30

030 130 230 300 301 302 303 304 305 306 307 308 309 30a 30b 30c 30d 30e 30f 330 430 530 630 730 830 930 a30 b30 c30 d30 e30 f30