Generating hex colors

[tascien]

I have an application that create charts. I don't know how many bars
will be generated, the number will depend on the data fed to the chart.


What I want is not be able to generate a hex color for each unique bar.
What is the formula to generate hex colors?

Anyhelp would be appreciated.

 

[Rik]

I have an application that create charts. I don't know how many bars
will be generated, the number will depend on the data fed to the
chart.


What I want is not be able to generate a hex color for each unique
bar. What is the formula to generate hex colors?

Anyhelp would be appreciated.

First of all, choosing about 30 colors beforehand is wiser. You can control
the contrast with it, and avoid that a random color accidentaly (closely)
matches an already existing color.

In what language is your application?

In PHP I'd do this:
$hex = dechex(mt_rand(0,255)).dechex(mt_rand(0,255)).dechex(mt_rand(0,255));

Grtz,

 

[tascien]

thanks. I think i am going to take your advice and select 50 colors and
if the colors are done, I start from the beginning.

ps. I use C#. I don't know if there is an equivalent of that.

T.