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<html><link rel="stylesheet" href="https://www.w3schools.com/w3css/5/w3.css"><link rel="stylesheet" href="https://www.w3schools.com/lib/w3-colors-2021.css"><body><div class="w3-container"> <h1>Using w3-colors-2021</h1> <div class="w3-container w3-2021-inkwell"> <h1>Inkwell</h1> </div> <div class="w3-container w3-2021-ultimate-gray"> <h1>Ultimate Gray</h1> </div> <div class="w3-container w3-2021-buttercream"> <h1>Buttercream</h1> </div></div></body></html>