Due to the more recent updates to 'Counter-Strike: Source' some things have changed, that also affects the crosshair preferences.


Custom Crosshair-Size:

In order to be able to manually set the size of your crosshair (what still can be done by the usage of the variable cl_crosshairscale) you have to activate a boolean variable (set to 1) that is deactivated (set to 0) by default.
To activate the usage of cl_crosshairscale type the following into the console (alternatively you can change the value directly inside of your 'config.cfg'):

cl_legacy_crosshair_scale 1

After you've done this the value of cl_crosshairscale will affect your crosshair-size (again).


Custom Crosshair-Color:

I'm not sure since when, but 'Valve' fortunately; what is absolute expedient; implemented the opportunity to set/mix the color of the crosshair manually (again).
In order to be able to use a custom crosshair-color you first have to set cl_crosshaircolor to 5, now the crosshair will have/use the color defined by the red-, green- and blue-values (additive color system) that are stored/set in the variables cl_crosshaircolor_r, cl_crosshaircolor_g and cl_crosshaircolor_b.

An example for a white crosshair:
cl_crosshaircolor 5
cl_crosshaircolor_r 255
cl_crosshaircolor_g 255
cl_crosshaircolor_b 255


Summary of available Crosshair-Variables/CVars:

cl_crosshairsize [0 - 255] Size of crosshair lines
cl_crosshairthickness [0 - 255] Thickness of crosshair lines
cl_crosshairscale [0 - 65536] Size of crosshair
cl_legacy_crosshair_scale [0 / 1] Legacy crosshair ON/OFF
cl_legacy_crosshair_recoil [0 / 1] Crosshair behaviour depending on FPS ON/OFF
cl_crosshaircolor [0 - 5] Crosshair-color (5 = Custom color)
cl_crosshaircolor_r [0 - 255] Value of red-intensity
cl_crosshaircolor_g [0 - 255] Value of green-intensity
cl_crosshaircolor_b [0 - 255] Value of blue-intensity
cl_crosshairalpha [0 - ?] Transparency of crosshair
cl_crosshairusealpha [0 / 1] Translucent crosshair ON/OFF
cl_dynamiccrosshair [0 / 1] Dynamic crosshair ON/OFF


I hope that information is helpfull/useful for some of you...