"pers" meaning in Ancien français

{
  "categories": [
    {
      "kind": "other",
      "name": "Adjectifs en ancien français",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Ancien français",
      "orig": "ancien français",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "lang": "Français",
      "lang_code": "fr",
      "word": "pers"
    }
  ],
  "lang": "Ancien français",
  "lang_code": "fro",
  "pos": "adj",
  "pos_title": "Adjectif",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en ancien français",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Exemples en ancien français à traduire",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "Le Roman de Troie, édition de Constans, tome III,page 309, c. 1165. Blef, bleu",
          "text": "Le cors ot blef e pers e neir"
        }
      ],
      "glosses": [
        "Bleu, bleu tirant sur le violet, livide."
      ],
      "id": "fr-pers-fro-adj-qXCJr4E2"
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "pers"
}

{
  "categories": [
    "Adjectifs en ancien français",
    "ancien français"
  ],
  "derived": [
    {
      "lang": "Français",
      "lang_code": "fr",
      "word": "pers"
    }
  ],
  "lang": "Ancien français",
  "lang_code": "fro",
  "pos": "adj",
  "pos_title": "Adjectif",
  "senses": [
    {
      "categories": [
        "Exemples en ancien français",
        "Exemples en ancien français à traduire"
      ],
      "examples": [
        {
          "ref": "Le Roman de Troie, édition de Constans, tome III,page 309, c. 1165. Blef, bleu",
          "text": "Le cors ot blef e pers e neir"
        }
      ],
      "glosses": [
        "Bleu, bleu tirant sur le violet, livide."
      ]
    }
  ],
  "tags": [
    "masculine"
  ],
  "word": "pers"
}