trustworthiness vectors colours not working

[thomas-fossati]

For example:

$ arc verify --alg ES256 --pkey data/pkey.json OK.jwt --color

on an xterm-256color terminal produces:

>> "OK.jwt" signature successfully verified using "data/pkey.json"
[claims-set]
{
  "ear.status": "affirming",
  "eat_profile": "tag:github.com/veraison/ar4si,2022-10-17",
  "ear.trustworthiness-vector": {
    "instance-identity": 2,
    "configuration": 2,
    "executables": 3,
    "file-system": 2,
    "hardware": 2,
    "runtime-opaque": 2,
    "storage-opaque": 2,
    "sourced-data": 2
  },
  "ear.raw-evidence": "3q2+7w==",
  "iat": 1666091373,
  "ear.appraisal-policy-id": "https://veraison.example/policy/1/60a0068d"
}
[trustworthiness vector]
Instance Identity [\033[42maffirming\033[0m]: recognized and not compromised
Configuration [\033[42maffirming\033[0m]: all recognized and approved
Executables [\033[42maffirming\033[0m]: recognized and approved boot-time
File System [\033[42maffirming\033[0m]: all recognized and approved
Hardware [\033[42maffirming\033[0m]: genuine
Runtime Opaque [\033[42maffirming\033[0m]: memory encryption
Storage Opaque [\033[42maffirming\033[0m]: encrypted secrets with HW-backed keys
Sourced Data [\033[42maffirming\033[0m]: from attesters in the affirming tier