Fix/theme gradients (#101934)

* Brighten the DesertBloom gradient

* Adjust gradient values so they're consistently rgba

packages/grafana-data/src/themes/themeDefinitions/desertbloom.ts

@@ -61,9 +61,10 @@ const desertBloomTheme: NewThemeOptions = {
       disabledBackground: 'rgba(168, 156, 134, 0.06)',
       disabledOpacity: 0.38,
     },
+
     gradients: {
-      brandHorizontal: 'linear-gradient(270deg, #FF6F61 0%, #ece0d1 100%)',
+      brandHorizontal: 'linear-gradient(270deg,rgba(255, 111, 97, 1) 0%, rgba(255, 167, 58, 1) 100%)',
-      brandVertical: 'linear-gradient(0.01deg, #FF6F61 0.01%, #ece0d1 99.99%)',
+      brandVertical: 'linear-gradient(0deg, rgba(255, 111, 97, 1) 0%, rgba(255, 167, 58, 1) 100%)',
     },
     contrastThreshold: 3,
     hoverFactor: 0.03,