Here's a trick I discovered, since some of the more popular skinners here who do a remarkable job of creating skins are fans of minimalism, and I can't get enough color in my life -- if you create a texture in that's a solid color (or in your case, a metallic blue texture), and apply it....BAM! You colored a skin that was colorless!

Here's a link to Island Dog's video on how to create textures in Windowblinds:  http://islanddog.impulsedriven.net/article/368219/Video_Creating_Textures_for_WindowBlinds

As a quick example, here's what the subscriber skin "Elan" looks like with a solid blue texture applied: