Now you can use hex code in {#555555} color format to colorize everything you want. More or less everything, still work in progress, but most CMI things support this format in 1.16.x+ version. This format currently will not work in books and motd, everything else should support it, like item name, item lore, action bar, titlebar, bossbar, tablist, nicknames, signs, public messages, private messages and ofcourse locale files.
Removed some deprecated exploit protection related to item pickup, this might be related to some recent reports. Cant say it was caused by this, but in any case, its gone now.
New command for 1.16+ servers as /cmi itemframe (visible/fixed/invulnerable) where visible - hides or shows item frame, fixed - prevents item rotation in item frame and invulnerable prevents item frame from being destroyed. Keep in mind that destroying block on which item frame is will still destroy it.