Skype fail

I was recently asked to have a conversation with someone on Skype.
It seemed a reasonable request, although I have seldom used Skype.
The caller sent me a chat message, then initiated the call. Skype uses similar icons in red and green, side by side, to initiate a call and terminate it:

Skype phone

I clicked on the wrong one, so embarrassingly killed the call. On the second attempt I clicked the other icon and we had our conversation.
Once again I see no need for these colours to be used, so come on Skype make sure that you have colourblind usability testers. I'm available for a large fee.

Let's change how we see the world

I am colourblind, like 10% of men and 1 in 200 women..
I have trouble distinguishing between red, green and brown colours.
It is seldom a problem. I just ask my wife if it's important to name a colour, but I've just realised that colourblind people are being discriminated against by a lot of organisations.
For example red and green are commonly used to denote stop/go, good/bad, dial/hang up...
That is ok for traffic lights, because even if one cannot tell the colours apart (I hasten to add that I can), they are always in the same relative positions. Most colourblind people are like me and have the same problem distinguishing between red, green and brown colours that have similar depths.
By depth I mean similar levels of brightness, for example this graphic published by a consumer organisation:-

Graph with unnecessary red and green

These have similar levels of brightness:

The same graph in shades of grey

 I don't see any reason why the graphic needed to have red and green (brown?) lines. Why couldn't they use red and yellow?