Tmux dim-colour issue

mux showmsgs -T.log

Terminal 0: xterm-256color [references=1, flags=0x1]:
   1: acsc: (string) ``aaffggiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz{{||}}~~
   0: AX: (flag) true
   2: bel: (string) \007
   3: blink: (string) \033[5m
   4: bold: (string) \033[1m
   5: civis: (string) \033[?25l
   6: clear: (string) \033[H\033[2J
   7: cnorm: (string) \033[?12l\033[?25h
   8: colors: (number) 256
   9: Cr: (string) \033]112\007
  10: Cs: (string) \033]12;%p1%s\007
  11: csr: (string) \033[%i%p1%d;%p2%dr
  12: cub: (string) \033[%p1%dD
  13: cub1: (string) \010
  14: cud: (string) \033[%p1%dB
  15: cud1: (string) \012
  16: cuf: (string) \033[%p1%dC
  17: cuf1: (string) \033[C
  18: cup: (string) \033[%i%p1%d;%p2%dH
  19: cuu: (string) \033[%p1%dA
  20: cuu1: (string) \033[A
  21: cvvis: (string) \033[?12;25h
  22: dch: (string) \033[%p1%dP
  23: dch1: (string) \033[P
  24: dim: [missing]
  25: dl: (string) \033[%p1%dM
  26: dl1: (string) \033[M
  27: E3: [missing]
  28: ech: (string) \033[%p1%dX
  29: el: (string) \033[K
  30: el1: (string) \033[1K
  31: enacs: [missing]
  32: fsl: (string) \007
  33: home: (string) \033[H
  34: hpa: (string) \033[%i%p1%dG
  35: ich: (string) \033[%p1%d@
  36: ich1: [missing]
  37: il: (string) \033[%p1%dL
  38: il1: (string) \033[L
  39: invis: (string) \033[8m
  40: is1: [missing]
  41: is2: (string) \033[!p\033[?3;4l\033[4l\033>
  42: is3: [missing]
  43: kcbt: (string) \033[Z
  44: kcub1: (string) \033OD
  45: kcud1: (string) \033OB
  46: kcuf1: (string) \033OC
  47: kcuu1: (string) \033OA
  48: kDC: (string) \033[3;2~
  49: kDC3: (string) \033[3;3~
  50: kDC4: (string) \033[3;4~
  51: kDC5: (string) \033[3;5~
  52: kDC6: (string) \033[3;6~
  53: kDC7: (string) \033[3;7~
  54: kdch1: (string) \033[3~
  55: kDN: (string) \033[1;2B
  56: kDN3: (string) \033[1;3B
  57: kDN4: (string) \033[1;4B
  58: kDN5: (string) \033[1;5B
  59: kDN6: (string) \033[1;6B
  60: kDN7: (string) \033[1;7B
  61: kend: (string) \033OF
  62: kEND: (string) \033[1;2F
  63: kEND3: (string) \033[1;3F
  64: kEND4: (string) \033[1;4F
  65: kEND5: (string) \033[1;5F
  66: kEND6: (string) \033[1;6F
  67: kEND7: (string) \033[1;7F
  68: kf1: (string) \033OP
  69: kf10: (string) \033[21~
  70: kf11: (string) \033[23~
  71: kf12: (string) \033[24~
  72: kf13: (string) \033[1;2P
  73: kf14: (string) \033[1;2Q
  74: kf15: (string) \033[1;2R
  75: kf16: (string) \033[1;2S
  76: kf17: (string) \033[15;2~
  77: kf18: (string) \033[17;2~
  78: kf19: (string) \033[18;2~
  79: kf2: (string) \033OQ
  80: kf20: (string) \033[19;2~
  81: kf21: (string) \033[20;2~
  82: kf22: (string) \033[21;2~
  83: kf23: (string) \033[23;2~
  84: kf24: (string) \033[24;2~
  85: kf25: (string) \033[1;5P
  86: kf26: (string) \033[1;5Q
  87: kf27: (string) \033[1;5R
  88: kf28: (string) \033[1;5S
  89: kf29: (string) \033[15;5~
  90: kf3: (string) \033OR
  91: kf30: (string) \033[17;5~
  92: kf31: (string) \033[18;5~
  93: kf32: (string) \033[19;5~
  94: kf33: (string) \033[20;5~
  95: kf34: (string) \033[21;5~
  96: kf35: (string) \033[23;5~
  97: kf36: (string) \033[24;5~
  98: kf37: (string) \033[1;6P
  99: kf38: (string) \033[1;6Q
 100: kf39: (string) \033[1;6R
 101: kf4: (string) \033OS
 102: kf40: (string) \033[1;6S
 103: kf41: (string) \033[15;6~
 104: kf42: (string) \033[17;6~
 105: kf43: (string) \033[18;6~
 106: kf44: (string) \033[19;6~
 107: kf45: (string) \033[20;6~
 108: kf46: (string) \033[21;6~
 109: kf47: (string) \033[23;6~
 110: kf48: (string) \033[24;6~
 111: kf49: (string) \033[1;3P
 112: kf5: (string) \033[15~
 113: kf50: (string) \033[1;3Q
 114: kf51: (string) \033[1;3R
 115: kf52: (string) \033[1;3S
 116: kf53: (string) \033[15;3~
 117: kf54: (string) \033[17;3~
 118: kf55: (string) \033[18;3~
 119: kf56: (string) \033[19;3~
 120: kf57: (string) \033[20;3~
 121: kf58: (string) \033[21;3~
 122: kf59: (string) \033[23;3~
 123: kf6: (string) \033[17~
 124: kf60: (string) \033[24;3~
 125: kf61: (string) \033[1;4P
 126: kf62: (string) \033[1;4Q
 127: kf63: (string) \033[1;4R
 128: kf7: (string) \033[18~
 129: kf8: (string) \033[19~
 130: kf9: (string) \033[20~
 131: kHOM: (string) \033[1;2H
 132: kHOM3: (string) \033[1;3H
 133: kHOM4: (string) \033[1;4H
 134: kHOM5: (string) \033[1;5H
 135: kHOM6: (string) \033[1;6H
 136: kHOM7: (string) \033[1;7H
 137: khome: (string) \033OH
 138: kIC: (string) \033[2;2~
 139: kIC3: (string) \033[2;3~
 140: kIC4: (string) \033[2;4~
 141: kIC5: (string) \033[2;5~
 142: kIC6: (string) \033[2;6~
 143: kIC7: (string) \033[2;7~
 144: kich1: (string) \033[2~
 145: kLFT: (string) \033[1;2D
 146: kLFT3: (string) \033[1;3D
 147: kLFT4: (string) \033[1;4D
 148: kLFT5: (string) \033[1;5D
 149: kLFT6: (string) \033[1;6D
 150: kLFT7: (string) \033[1;7D
 151: kmous: (string) \033[M
 152: knp: (string) \033[6~
 153: kNXT: (string) \033[6;2~
 154: kNXT3: (string) \033[6;3~
 155: kNXT4: (string) \033[6;4~
 156: kNXT5: (string) \033[6;5~
 157: kNXT6: (string) \033[6;6~
 158: kNXT7: (string) \033[6;7~
 159: kpp: (string) \033[5~
 160: kPRV: (string) \033[5;2~
 161: kPRV3: (string) \033[5;3~
 162: kPRV4: (string) \033[5;4~
 163: kPRV5: (string) \033[5;5~
 164: kPRV6: (string) \033[5;6~
 165: kPRV7: (string) \033[5;7~
 166: kRIT: (string) \033[1;2C
 167: kRIT3: (string) \033[1;3C
 168: kRIT4: (string) \033[1;4C
 169: kRIT5: (string) \033[1;5C
 170: kRIT6: (string) \033[1;6C
 171: kRIT7: (string) \033[1;7C
 172: kUP: (string) \033[1;2A
 173: kUP3: (string) \033[1;3A
 174: kUP4: (string) \033[1;4A
 175: kUP5: (string) \033[1;5A
 176: kUP6: (string) \033[1;6A
 177: kUP7: (string) \033[1;7A
 178: Ms: (string) \033]52;%p1%s;%p2%s\007
 179: op: (string) \033[39;49m
 180: rev: (string) \033[7m
 181: ri: (string) \033M
 182: rmacs: (string) \033(B
 183: rmcup: (string) \033[?1049l
 184: rmkx: (string) \033[?1l\033>
 185: Se: (string) \033[2 q
 186: setab: (string) \033[%?%p1%{8}%<%t4%p1%d%e%p1%{16}%<%t10%p1%{8}%-%d%e48;5;%p1%d%;m
 187: setaf: (string) \033[%?%p1%{8}%<%t3%p1%d%e%p1%{16}%<%t9%p1%{8}%-%d%e38;5;%p1%d%;m
 188: sgr0: (string) \033(B\033[m
 189: sitm: [missing]
 190: smacs: (string) \033(0
 191: smcup: (string) \033[?1049h
 192: smkx: (string) \033[?1h\033=
 193: smso: (string) \033[7m
 194: smul: (string) \033[4m
 195: Ss: (string) \033[%p1%d q
 196: tsl: (string) \033]0;
 197: vpa: (string) \033[%i%p1%dd
 198: xenl: (flag) true
 199: XT: (flag) true