Oh My Posh自定义主题background_template颜色失效问题求助

我给PowerShell提示符做了个Oh My Posh自定义主题，其他代码都正常运行，只有background_template的条件为真时无法设置背景色。系统能正确识别条件成立，但完全忽略#ff0000（红色）这个颜色值。正确的配置方式是什么？

预期效果：

实际效果：

原始配置代码 #

{
  "$schema": "https://raw.githubusercontent.com/JanDeDobbeleer/oh-my-posh/main/themes/schema.json",
  "blocks": [
    {
      "alignment": "left",
      "segments": [
        {
          "background": "#42E66C",
          "background_templates": [
            "{{ if eq .Env.ElevatedPINNotAuthorized \"True\" }} #ff0000 {{ end }}"
          ],
          "foreground": "#ffffff",
          "leading_diamond": "\ue0b6",
          "style": "diamond",
          "template": " {{ if .WSL }}WSL at {{ end }}{{.Icon}} ",
          "type": "os"
        },
        {
          "background": "#42E66C",
          "background_templates": [
            "{{ if eq .Env.ElevatedPINNotAuthorized \"True\" }} #ff0000 {{ end }}"
          ],
          "foreground": "#ffffff",
          "style": "powerline",
          "template": " {{ .Env.CyberCredential }} ",
          "type": "session"
        },
        {
          "background": "lightBlue",
          "foreground": "black",
          "powerline_symbol": "\ue0b0",
          "properties": {
            "style": "full"
          },
          "style": "powerline",
          "template": " \ue5ff {{ .Path }} ",
          "type": "path"
        },
        {
          "background": "#ec9706",
          "foreground": "#100e23",
          "leading_diamond": "<transparent,background>\ue0b0</>",
          "properties": {
            "always_enabled": true
          },
          "style": "diamond",
          "template": " \ufbab {{ .FormattedMs }}\u2800",
          "trailing_diamond": "\ue0b0",
          "type": "executiontime"
        }
      ],
      "type": "prompt"
    }
  ],
  "final_space": true,
  "version": 2
}

尝试过的带else的简化配置（未生效） #

{
  "$schema": "https://raw.githubusercontent.com/JanDeDobbeleer/oh-my-posh/main/themes/schema.json",
  "blocks": [
    {
      "alignment": "left",
      "segments": [
        {
          "background_templates": [
            " {{if eq .Env.ElevatedPINNotAuthorized \"True\" }}#ff0000{{ else }}#42E66C{{ end }}"
          ],
          "foreground": "#ffffff",
          "leading_diamond": "\ue0b6",
          "style": "diamond",
          "template": " {{ if .WSL }}WSL at {{ end }}{{.Icon}} ",
          "type": "os"
        },
        {
          "background_templates": [
            " {{if eq .Env.ElevatedPINNotAuthorized \"True\" }}#ff0000{{ else }}#42E66C{{ end }}"
          ],
          "foreground": "#ffffff",
          "style": "powerline",
          "template": " {{ .Env.CyberCredential }} ",
          "type": "session"
        },
        {
          "background": "lightBlue",
          "foreground": "black",
          "powerline_symbol": "\ue0b0",
          "properties": {
            "style": "full"
          },
          "style": "powerline",
          "template": " \ue5ff {{ .Path }} ",
          "type": "path"
        },
        {
          "background": "#ec9706",
          "foreground": "#100e23",
          "leading_diamond": "<transparent,background>\ue0b0</>",
          "properties": {
            "always_enabled": true
          },
          "style": "diamond",
          "template": " \ufbab {{ .FormattedMs }}\u2800",
          "trailing_diamond": "\ue0b0",
          "type": "executiontime"
        }
      ],
      "type": "prompt"
    }
  ],
  "final_space": true,
  "version": 2
}

问题原因与解决方法 #

问题出在模板字符串中的多余空格：

1. 第一个配置里，background_templates的条件语句中，#ff0000前后有空格，Oh My Posh解析时会把带空格的字符串当作无效颜色值，直接忽略。
2. 第二个带else的配置里，模板字符串开头有空格，同样会导致解析失败。

修正后的配置需要移除颜色值前后及模板开头的所有多余空格，确保模板输出的是纯颜色代码：

修正后的配置示例（保留默认background的写法）

{
  "$schema": "https://raw.githubusercontent.com/JanDeDobbeleer/oh-my-posh/main/themes/schema.json",
  "blocks": [
    {
      "alignment": "left",
      "segments": [
        {
          "background": "#42E66C",
          "background_templates": [
            "{{ if eq .Env.ElevatedPINNotAuthorized \"True\" }}#ff0000{{ end }}"
          ],
          "foreground": "#ffffff",
          "leading_diamond": "\ue0b6",
          "style": "diamond",
          "template": " {{ if .WSL }}WSL at {{ end }}{{.Icon}} ",
          "type": "os"
        },
        {
          "background": "#42E66C",
          "background_templates": [
            "{{ if eq .Env.ElevatedPINNotAuthorized \"True\" }}#ff0000{{ end }}"
          ],
          "foreground": "#ffffff",
          "style": "powerline",
          "template": " {{ .Env.CyberCredential }} ",
          "type": "session"
        },
        {
          "background": "lightBlue",
          "foreground": "black",
          "powerline_symbol": "\ue0b0",
          "properties": {
            "style": "full"
          },
          "style": "powerline",
          "template": " \ue5ff {{ .Path }} ",
          "type": "path"
        },
        {
          "background": "#ec9706",
          "foreground": "#100e23",
          "leading_diamond": "<transparent,background>\ue0b0</>",
          "properties": {
            "always_enabled": true
          },
          "style": "diamond",
          "template": " \ufbab {{ .FormattedMs }}\u2800",
          "trailing_diamond": "\ue0b0",
          "type": "executiontime"
        }
      ],
      "type": "prompt"
    }
  ],
  "final_space": true,
  "version": 2
}

修正后的带else的配置

{
  "$schema": "https://raw.githubusercontent.com/JanDeDobbeleer/oh-my-posh/main/themes/schema.json",
  "blocks": [
    {
      "alignment": "left",
      "segments": [
        {
          "background_templates": [
            "{{if eq .Env.ElevatedPINNotAuthorized \"True\" }}#ff0000{{ else }}#42E66C{{ end }}"
          ],
          "foreground": "#ffffff",
          "leading_diamond": "\ue0b6",
          "style": "diamond",
          "template": " {{ if .WSL }}WSL at {{ end }}{{.Icon}} ",
          "type": "os"
        },
        {
          "background_templates": [
            "{{if eq .Env.ElevatedPINNotAuthorized \"True\" }}#ff0000{{ else }}#42E66C{{ end }}"
          ],
          "foreground": "#ffffff",
          "style": "powerline",
          "template": " {{ .Env.CyberCredential }} ",
          "type": "session"
        },
        {
          "background": "lightBlue",
          "foreground": "black",
          "powerline_symbol": "\ue0b0",
          "properties": {
            "style": "full"
          },
          "style": "powerline",
          "template": " \ue5ff {{ .Path }} ",
          "type": "path"
        },
        {
          "background": "#ec9706",
          "foreground": "#100e23",
          "leading_diamond": "<transparent,background>\ue0b0</>",
          "properties": {
            "always_enabled": true
          },
          "style": "diamond",
          "template": " \ufbab {{ .FormattedMs }}\u2800",
          "trailing_diamond": "\ue0b0",
          "type": "executiontime"
        }
      ],
      "type": "prompt"
    }
  ],
  "final_space": true,
  "version": 2
}

核心要点：模板字符串必须输出无多余空格的纯颜色代码，Oh My Posh对颜色值的解析非常严格，任何额外空格都会被视为无效值。

内容的提问来源于Stack Exchange，提问作者MKANET