Here is a color palette based on your light and dark mode queries:

json
{
  "palette_name": "Light and Dark Mode Palette",
  "colors": [
    {
      "name": "App Background (Light)",
      "hex_code": "
          
          #F9FAFB
       "
    },
    {
      "name": "Cards / Panels (Light)",
      "hex_code": "
          
          #FFFFFF
       "
    },
    {
      "name": "Subtle Section Background (Light)",
      "hex_code": "
          
          #E5E7EB
       "
    },
    {
      "name": "Primary Text (Light)",
      "hex_code": "
          
          #111827
       "
    },
    {
      "name": "Secondary Text (Light)",
      "hex_code": "
          
          #4B5563
       "
    },
    {
      "name": "Muted Labels (Light)",
      "hex_code": "
          
          #9CA3AF
       "
    },
    {
      "name": "Primary Color (Light)",
      "hex_code": "
          
          #1A73E8
       "
    },
    {
      "name": "Secondary Color (Light)",
      "hex_code": "
          
          #2EC4B6
       "
    },
    {
      "name": "Positive Color (Light)",
      "hex_code": "
          
          #16A34A
       "
    },
    {
      "name": "Negative Color (Light)",
      "hex_code": "
          
          #DC2626
       "
    },
    {
      "name": "Warning Color (Light)",
      "hex_code": "
          
          #F59E0B
       "
    },
    {
      "name": "Light Border",
      "hex_code": "
          
          #CBD5E0
       "
    },
    {
      "name": "Table Gridlines (Light)",
      "hex_code": "
          
          #E5E7EB
       "
    },
    {
      "name": "Series 1 (Actual, Light)",
      "hex_code": "
          
          #1A73E8
       "
    },
    {
      "name": "Series 2 (Budget, Light)",
      "hex_code": "
          
          #315B61
       "
    },
    {
      "name": "Series 3 (Forecast, Light)",
      "hex_code": "
          
          #F59E0B
       "
    },
    {
      "name": "Anomalies / Outliers (Light)",
      "hex_code": "
          
          #DC2626
       "
    },
    {
      "name": "App Background (Dark)",
      "hex_code": "
          
          #0B1120
       "
    },
    {
      "name": "Cards / Panels (Dark)",
      "hex_code": "
          
          #020617
       "
    },
    {
      "name": "Elevated Sections (Dark)",
      "hex_code": "
          
          #111827
       "
    },
    {
      "name": "Primary Text (Dark)",
      "hex_code": "
          
          #E5E7EB
       "
    },
    {
      "name": "Secondary Text (Dark)",
      "hex_code": "
          
          #9CA3AF
       "
    },
    {
      "name": "Muted Labels (Dark)",
      "hex_code": "
          
          #6B7280
       "
    },
    {
      "name": "Primary Color (Dark)",
      "hex_code": "
          
          #1A73E8
       "
    },
    {
      "name": "Secondary Color (Dark)",
      "hex_code": "
          
          #2EC4B6
       "
    },
    {
      "name": "Positive Color (Dark)",
      "hex_code": "
          
          #22C55E
       "
    },
    {
      "name": "Negative Color (Dark)",
      "hex_code": "
          
          #F97373
       "
    },
    {
      "name": "Warning Color (Dark)",
      "hex_code": "
          
          #FACC15
       "
    },
    {
      "name": "Card Border (Dark)",
      "hex_code": "
          
          #1F2937
       "
    },
    {
      "name": "Table Gridlines (Dark)",
      "hex_code": "
          
          #374151
       "
    },
    {
      "name": "Series 1 (Actual, Dark)",
      "hex_code": "
          
          #7EBCF9
       "
    },
    {
      "name": "Series 2 (Budget, Dark)",
      "hex_code": "
          
          #9EC8A4
       "
    },
    {
      "name": "Series 3 (Forecast, Dark)",
      "hex_code": "
          
          #FBBF24
       "
    },
    {
      "name": "Anomalies (Dark)",
      "hex_code": "
          
          #F97373
       "
    }
  ]
}

This palette includes colors for both light and dark modes, ensuring that your application can maintain a cohesive look and feel regardless of the user’s preference.

Do you need any specific adjustments to this palette or any additional colors?