feat: dark/light theming with emotion

src/styles/theme.js

@@ -0,0 +1,22 @@
+const theme = {
+  LIGHT: {
+    colors: {
+      primary: "#2E3136",
+      secondary: "#999",
+      tertiary: "#C4C4C4",
+      quarternary: "#EAEAEA",
+      background: "#FAFBFC"
+    }
+  },
+  DARK: {
+    colors: {
+      primary: "#F3F6F8",
+      secondary: "#9Ba3B0",
+      tertiary: "#6F7682",
+      quarternary: "#3E4B62",
+      background: "#2E3136"
+    }
+  }
+};
+
+export default theme;