Move nav onto second header row. Improve colour contrast on colour scheme picker

tailwind.config.js

@@ -14,7 +14,13 @@ module.exports = {
 			'2xl': '1536px',
 			'3xl': '1920px',
 	 	},
-		colors: colors,
+		colors: {
+			...colors,
+			neutral: {
+				...colors.neutral,
+				400: '#b1b1b1'
+			}
+		},
 		backgroundColor: ({theme}) => theme('colors'),
 		textColor: ({theme}) => theme('colors'),
 		spacing: {