Need to drive 4 rgb leds, but have only 1 pin available...

[pedja089]

Yes, but APA needs two legs. Data and clock,. Or I'm wrong?

Not necessary, you can create clock and data using only one pin.
eg
https://www.romanblack.com/shift1.htm

[CuriousOne]

This is customizable backlight, so user will be setting the color. Idea with shift register is nice, but if I have to add an extra IC, I can add say 12F683 and use it directly to drive RGB leds. Footprint will be much smaller

[pedja089]

You missed the point...
Use same RC circuit to drive APA LED. Apa have Data and Clock pin and you have one pin free.

[towlerg]

Out of the box. A small PIC device running the 4 LEDs and reading a 2 bit serial pattern with a longish pause to sync.