I just used them in a simple infinity mirror and have the switch to toggle between with lights I want. with an accelerometer will I still be able to get for example 0-10km/h = Green lights etc...

The simple answer is No. You need to program and provide the calculations for what you want to do.

With the hall-effect switch, you have to count the rotations of a wheel. knowing the diameter of the wheel

you define the wheel circumference. passed on the wheel circumference you calculate how many rotations does it take for 1 kilometer.

While you are counting wheel rotations you need to count how fast the rotational count is occurring.

The wheel rotations per unit time will give you a rough Kilometer per hour.

Once you have that you drop it into a switch statement to determine what color the LED strip should be.

You will need to make the rotational count and rotational rate interrupt driven if you do not want to miss any data.

Either way you have some programming and calculations to work through.

This is not a plug and play project.

How you mount the hall-effect sensor so that it is not destroyed in a skateboard accident?

Where to mount the power mosfets?

This is not a weekend project, this is a long project.

building the power mosfet controller for the analog LED strip should alone keep you busy.