Colour of numbers

I was mucking around in my image editor (Paint.NET) because I was doing some CSS colour editing. While I was playing around with the HSV of the colour, I saw this in the RGB box: 314159. You know what that reminds me of? PI. No, not that pie, PI! Great, now I’m hungry…

So I wondered what numbers would look like if they had colours.

First, we have PI as 3.14159 (ratio of a circle’s circumference to its diameter)
Colour of PI

Then we have the constant e, 2.71828
Colour of e

Fibonacci and his sequence also make an appearance: 1, 1, 2, 3, 5, 8 (13, 21, 34, …)
Colour of Fibonacci sequence

We also have the golden ratio, 1.61803. It’s also the limit as the (n+1)th term divide by the nth term in the Fibonacci sequence.
Colour of golden ratio

For some reason, I remember the Avogadro constant, even though I don’t do chemistry or physics anymore… It’s 6.02214179 x 10^23. Yes, it’s a big number… The colour also reminds me of bromine gas, which is reddish-brown in colour. Wait, how come I still remember these things?
Colour of Avogadro constant

Here’s an interesting one. Absolute zero is the theoretical temperature where everything barely has energy. It’s defined as 0 Kelvin, and is equal to -273.15 degree Celsius. And you thought ice at 0 degree Celsius was cold…
Colour of Absolute Zero