I put subscribed mailing lists and color defining in two file. then source them in muttrc. I tested with this style: commit all of them, then remove commit a little by a little. Now I find which one causes this problem. I define a color for mailing list in color define file. {{ color index white black ~u color index white black ~l color index black green ~T # tagged color indicator brightwhite brightred }} ~u and ~l are about mailing list. when I set this, then I can not use tagged color to color mailing list entry. but indicator color can work on mailing list entry. weird other colors define are all fine.
-- I will have my own life finally. I believe myself cause I can.