This removes a hard-coded "white" from the styling of the
button. Instead, the theme designer can now choose an appropriate
color for text that is displayed against a background of
--accent-color.
/* A little color to avoid a fully monochromatic theme. */
--accent-color: #287789;
--accent-color-bright: #44c7ef;
+ --text-fg-on-accent: white;
/* Some colors intended to convey semnatics. */
--warning-color: #ffa92a;
border-radius: 4px;
background-color: var(--accent-color);
border: none;
- color: white;
+ color: var(--text-fg-on-accent);
text-align: center;
font-size: 125%;
margin-top: .25em;