style: color palette update

tailwind.config.cjs

@@ -34,6 +34,20 @@ module.exports = {
           },
         },
       },
+      colors: {
+        gray: {
+          50: '#f7f7f8',
+          100: '#ececf1',
+          200: '#d9d9e3',
+          300: '#d1d5db',
+          400: '#acacbe',
+          500: '#8e8ea0',
+          600: '#4b5563',
+          700: '#40414f',
+          800: '#343541',
+          900: '#202123',
+        },
+      },
     },
   },
   plugins: [require('@tailwindcss/typography')],