is now part of Shuffle™. You can use the editor on this domain, but we encourage you to try Shuffle →. Shuffle™ includes templates for Tailwind CSS, Bootstrap, Bulma, and Material-UI.
← Tailwind CSS classes list

Tailwind CSS class: .placeholder-gray-700::placeholder

<input class="placeholder-gray-700 block" placeholder="Text"/>

Preview

CSS source

.placeholder-gray-700::placeholder { color: #4a5568; }

More in Tailwind CSS Utilities