Tailwind text color shown in blue instead of grey

I am working on a react js project with node and npm as a package manager.

Inside my project I am using multiple packages like heroicons and tailwind.

Inside my footer I want the text to be grey - therefore I am using the "text-slate-500" color inside my Footer.js file.

My result is being shown in blue and underlined, even though I am not using the underline property inside my code.

I am a total beginner with frontend development and also a newbie to tailwind css. So every help is very much appreciated and I am sorry in advance if some information is missing.

Here are the files:

Footer.js

import React from 'react'
import { HomeIcon } from '@heroicons/react/outline'


export const Footer = () => {
  return (
    <footer className="mx-auto mt-32 w-full max-w-container px-4 sm:px-6 lg:px-8">
      <div className="border-t border-slate-900/5 py-10 row-start-auto">
        <p className="mt-5 text-center text-sm leading-6 text-slate-500">© {new Date().getFullYear()} Hochschule für angewandte Wissenschaften Würzburg - Schweinfurt</p>
        <div className="mt-16 flex items-center justify-center space-x-4 text-sm font-semibold leading-6 text-slate-700">
          <a href="/datenschutz">Datenschutz</a>
          <div className="h-4 w-px bg-slate-500/20">
          </div>
          <a href="/impressum">Impressum</a>
          <div className="h-4 w-px bg-slate-500/20"></div>
          <a href="/barrierefreiheit">Barrierefreiheit</a>
          <div className="h-4 w-px bg-slate-500/20"></div>
          <a href="/">Deutsch - English</a>
        </div>
      </div>
    </footer>
  )
}

export default Footer;

package.json

{
  "name": "aicard",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@headlessui/react": "^1.6.6",
    "@heroicons/react": "^2.0.10",
    "@testing-library/jest-dom": "^5.16.4",
    "@testing-library/react": "^13.1.1",
    "@testing-library/user-event": "^13.5.0",
    "axios": "^0.27.2",
    "bootstrap": "^5.1.3",
    "chart.js": "^3.9.1",
    "fast-equals": "^4.0.1",
    "io": "^1.0.5",
    "nodemon": "^2.0.16",
    "query-string": "^7.1.1",
    "react": "^18.1.0",
    "react-chartjs-2": "^4.3.1",
    "react-dom": "^18.1.0",
    "react-router-dom": "^6.3.0",
    "react-scripts": "^5.0.1",
    "socket.io-client": "^4.5.1",
    "web-vitals": "^2.1.4"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": [
      "react-app",
      "react-app/jest"
    ]
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  },
  "devDependencies": {
    "autoprefixer": "^10.4.8",
    "postcss": "^8.4.16",
    "tailwindcss": "^3.1.8"
  }
}

tailwind.config.js

/** @type {import('tailwindcss').Config} */ 
module.exports = {
  content: [
    "./src/**/*.{js,jsx,ts,tsx}",
  ],
  theme: {
    extend: {
      colors: {
        'regal-blue': '#243c5a',
        'gameblue': '#1d3f56',
        'gamebluehover' : '#122736',
        'gamebluelight' : '#244f6b',
        'gamebluelightest' :'#326d94',
        'fhwsorange' : '#dd742e',
        'gameboardconfig' : '#2e4c61',
      },
    },
  },
  plugins: [],
}

And this is my result: Footer.js visualized