Increase contrast in Redoc a little bit

Author: belbiy

_layouts/redoc.html

@@ -17,8 +17,24 @@
         lazyRendering: true,
         theme: {
             colors: {
+                tonalOffset: 0.2,
                 primary: {
                     main: '#2b2b2c',
+                },
+                success: {
+                    main: '#008000',
+                    light: '#ecf7ed',
+                },
+                error: {
+                    main: '#cc0000',
+                },
+                responses: {
+                    success: {
+                        backgroundColor: '#ecf7ed',
+                    },
+                    error: {
+                        backgroundColor: '#ffebeb',
+                    }
                 }
             },
             typography: {