Rivington: Improve frontend RTL color styles.

- Remove text-color initial rules from background-color utility classes to allow color options to work more explicitly
- Fix outline button default text color and bg-color
- Strengthen background-color and text-color selectors to better deal with nesting
- Fix background-dim Gutenberg default bg-color issue

rivington/style-rtl.css

@@ -1514,7 +1514,6 @@ button[data-load-more-btn], .button {
 .wp-block-cover-image .wp-block-cover__inner-container,
 .wp-block-cover-image .wp-block-cover-image-text,
 .wp-block-cover-image .wp-block-cover-text {
-	color: currentColor;
 	margin-top: 32px;
 	margin-bottom: 32px;
 }
@@ -2439,49 +2438,50 @@ table th,
 	color: #060f29;
 }
 
-.has-background:not(.has-background-background-color) a,
+.has-background:not(.has-background-background-color) a:not(.wp-block-button__link),
+.has-background a:not(.wp-block-button__link),
 .has-background p, .has-background h1, .has-background h2, .has-background h3, .has-background h4, .has-background h5, .has-background h6 {
 	color: currentColor;
 }
 
-.has-primary-background-color {
+.has-primary-background-color,
+.has-primary-background-color.has-background-dim {
 	background-color: #CAAB57;
-	color: #060f29;
 }
 
-.has-secondary-background-color {
+.has-secondary-background-color,
+.has-secondary-background-color.has-background-dim {
 	background-color: #EE4266;
-	color: #060f29;
 }
 
-.has-foreground-background-color {
+.has-foreground-background-color,
+.has-foreground-background-color.has-background-dim {
 	background-color: #f2f2f2;
-	color: #060f29;
 }
 
-.has-foreground-light-background-color {
+.has-foreground-light-background-color,
+.has-foreground-light-background-color.has-background-dim {
 	background-color: white;
-	color: #060f29;
 }
 
-.has-foreground-dark-background-color {
+.has-foreground-dark-background-color,
+.has-foreground-dark-background-color.has-background-dim {
 	background-color: #8F8F8F;
-	color: #060f29;
 }
 
-.has-background-light-background-color {
+.has-background-light-background-color,
+.has-foreground-light-background-color.has-background-dim {
 	background-color: #0d1f55;
-	color: #f2f2f2;
 }
 
-.has-background-dark-background-color {
+.has-background-dark-background-color,
+.has-background-dark-background-color.has-background-dim {
 	background-color: #030713;
-	color: #f2f2f2;
 }
 
-.has-background-background-color {
+.has-background-background-color,
+.has-background-background-color.has-background-dim {
 	background-color: #060f29;
-	color: #f2f2f2;
 }
 
 .is-small-text,