Considering up to 10-12% of the worlds population has some sort of colour blindness it stands to reason there must be many Sitepoint members who are, I am!
As many people here are involved with web design in some way, and use the web on a daily basis, not being able to see [some] colours can obviously pose a few problems.
For me I can’t distinguish green/brown and most reds, also put blue/violet/purple in front of me and I’ll not be able to see the difference. That can present a problem or two, for instance the parking ticket machines in my town have two buttons - red for cancel (and return my coins), and green for print ticket - the instructions just tell me to “press the green button” to get my ticket but I don’t know what button is what - I’ve accidently got my money back on more than one occasion!
Colour blindness can sometimes have advantages. Of all the colour blind people I know we all have better night vision, we put it down to the fact that our eyes aren’t distracted by colour so can focus in on detail.
And don’t get me started on web link colours 
I’d love to read your experiences.
Thankfully, I’m not, but I did attempt to teach basic computer skills to an elderly friend who is. I don’t know how much she learned, but I found the experience educational. 
Me: Click on the Firefox icon.
Her: Umm…
Me: Sorry - it’s the wee orange blob between the two blue blobs at the top.
Her: Don’t see one of them. I’ve got a brown blob between two green ones, though. Shall I just go for that?
(Even worse was my blithe statement of “now remember, it’s the green button to turn it on” - when the green light only comes on after you press the button. 
)
If nothing else, it taught me to be very careful not to make the same kinds of mistakes in site design. I rely heavily on the Colour Contrast Analyser (and, fortunately, it runs on Linux with Wine. :))
hehe “I’ve got a brown blob between two green ones”, with me it’s just three blobs
Green lights? Reminds me of traffic lights, I can’t differentiate between red and amber, luckily they are stacked on top of each other and have a sequence
Hi, bluedreamer. May I ask how you settled on a handle with a named color? Are the colors that you see predominately blues or do they contain tints of blue?
Wow you shock me, according to this then 1 in 10 people are colour blind. I live in Europe’s Baltic states and never in my live I have met a colour blind person, only heard about this condition.
You have probably met lots of colour blind people. Unless it is relevant to the conversation they had no reason to tell you. In many cases they will be unaware themselves that there are colours they can’t see.
With the number of disabled internet users being somewhere around 70-80% (at least) it makes sense that colour blindness make up that portion.
Good question! It actually comes from the name of a song, and nothing to do with how I see blue
As felgall said you would never know unless someone told you. Perhaps you can bring it up in conversation with your friends to see if you do know people?