Added our root colours

static/style.css

@@ -16,3 +16,19 @@ body { padding-top: 56px; }
 /* footer */
 footer a { color: white; font-weight: bold; text-decoration: none; }
 footer a:hover { color: white; text-decoration: underline; }
+
+:root {
+    /* our colours*/
+    --darkpurple: #850F78; 
+    --purple: #B85BD1; 
+    --orange: #F57D22; 
+    --yellow: #F4CC1E; 
+    --lightblue: #A0A7F3 ; 
+    --offblack: #32232C ; 
+    --offwhite: #FFF6F2; 
+    /*igem colours*/
+    --igemdarkgreen: #006530; 
+    --igemmediumgreen: #019968; 
+    --igemlightgreen: #99cb9a; 
+  }
+  
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