Hello and welcome. Yes, this is all normal. The orange light means that your Wii is in standby with Wiiconnect24 turned on; you can turn this off by going into Wii Settings (which will result in your light being red again when powered off)...you may notice that your console gets rather hot, and to me this is a bad thing but some have no problem with this.
As far as the blue light, this was put in the mix with the last update to come on when you insert a disc...isn't it pretty? You will also notice that this blue light comes on when you have a message on your Wii. If you turn off Wiiconnect24 it will no longer tell you when there is a message.