enh(theming): Error contrast

Signed-off-by: Christopher Ng <chrng8@gmail.com>

apps/theming/css/default.css

@@ -20,6 +20,7 @@
   --color-error: #e9322d;
   --color-error-rgb: 233,50,45;
   --color-error-hover: #ed5a56;
+  --color-error-text: #e7201b;
   --color-warning: #eca700;
   --color-warning-rgb: 236,167,0;
   --color-warning-hover: #efb832;

apps/theming/lib/Themes/DarkTheme.php

@@ -59,6 +59,8 @@ class DarkTheme extends DefaultTheme implements ITheme {
 		$colorBoxShadow = $this->util->darken($colorMainBackground, 70);
 		$colorBoxShadowRGB = join(',', $this->util->hexToRGB($colorBoxShadow));
 
+		$colorError = '#e9322d';
+
 		return array_merge(
 			$defaultVariables,
 			$this->generatePrimaryVariables($colorMainBackground, $colorMainText),
@@ -82,6 +84,11 @@ class DarkTheme extends DefaultTheme implements ITheme {
 				'--color-text-light' => $this->util->darken($colorMainText, 10),
 				'--color-text-lighter' => $this->util->darken($colorMainText, 20),
 
+				'--color-error' => $colorError,
+				'--color-error-rgb' => join(',', $this->util->hexToRGB($colorError)),
+				'--color-error-hover' => $this->util->mix($colorError, $colorMainBackground, 60),
+				'--color-error-text' => $this->util->lighten($colorError, 3),
+
 				// used for the icon loading animation
 				'--color-loading-light' => '#777',
 				'--color-loading-dark' => '#CCC',

apps/theming/lib/Themes/DefaultTheme.php

@@ -109,6 +109,8 @@ class DefaultTheme implements ITheme {
 		$colorBoxShadow = $this->util->darken($colorMainBackground, 70);
 		$colorBoxShadowRGB = join(',', $this->util->hexToRGB($colorBoxShadow));
 
+		$colorError = '#e9322d';
+
 		$variables = [
 			'--color-main-background' => $colorMainBackground,
 			'--color-main-background-rgb' => $colorMainBackgroundRGB,
@@ -137,10 +139,11 @@ class DefaultTheme implements ITheme {
 
 			'--color-scrollbar' => 'rgba(' . $colorMainTextRgb . ', .15)',
 
-			// info/warning/success feedback colours
-			'--color-error' => '#e9322d',
-			'--color-error-rgb' => join(',', $this->util->hexToRGB('#e9322d')),
-			'--color-error-hover' => $this->util->mix('#e9322d', $colorMainBackground, 60),
+			// error/warning/success/info feedback colours
+			'--color-error' => $colorError,
+			'--color-error-rgb' => join(',', $this->util->hexToRGB($colorError)),
+			'--color-error-hover' => $this->util->mix($colorError, $colorMainBackground, 60),
+			'--color-error-text' => $this->util->darken($colorError, 4),
 			'--color-warning' => '#eca700',
 			'--color-warning-rgb' => join(',', $this->util->hexToRGB('#eca700')),
 			'--color-warning-hover' => $this->util->mix('#eca700', $colorMainBackground, 60),