JSFiddle - React, Tailwind, and code Playground
HTML
<p style="color: #1d1c1d">
This was sent. (RGB = #1d1c1d)
</p>
<p style="color: #1d1c1db3">
This was not sent. (RGBA = #1d1c1db3 over white)
</p>
<p style="color: #616161">
This was not sent. (RGB = #616161)
</p>CSS
* {background-color: white; font-family: sans-serif};