1 files changed, 30 insertions, 1 deletions
diff --git a/client/lib/color.js b/client/lib/color.js
index 5f873b3..4299c4b 100644
--- a/client/lib/color.js
+++ b/client/lib/color.js
@@ -30,4 +30,33 @@ function color (t, add, mul, alpha) {
   return 'rgba(' + rgb + ',' + alpha + ')'
 }
 
-export default color
+function hsl2rgb (H, S, L) {
+  var R,G,B;
+  var var_1, var_2;
+  if ( S == 0 ) {                     //HSL from 0 to 1
+     R = L * 255                      //RGB results from 0 to 255
+     G = L * 255
+     B = L * 255
+  }
+  else {
+     if ( L < 0.5 ) var_2 = L * ( 1 + S )
+     else           var_2 = ( L + S ) - ( S * L )
+
+     var_1 = 2 * L - var_2
+
+     R = 255 * hue2rgb( var_1, var_2, H + ( 1 / 3 ) ) 
+     G = 255 * hue2rgb( var_1, var_2, H )
+     B = 255 * hue2rgb( var_1, var_2, H - ( 1 / 3 ) )
+  }
+  return [R,G,B]
+}
+function hue2rgb( v1, v2, vH ) {
+   if ( vH < 0 ) vH += 1
+   if ( vH > 1 ) vH -= 1
+   if ( ( 6 * vH ) < 1 ) return ( v1 + ( v2 - v1 ) * 6 * vH )
+   if ( ( 2 * vH ) < 1 ) return ( v2 )
+   if ( ( 3 * vH ) < 2 ) return ( v1 + ( v2 - v1 ) * ( ( 2 / 3 ) - vH ) * 6 )
+   return ( v1 )
+}
+
+export default { color, hsl2rgb }