LED Blinking after replace
UPDATE

The question has become a moving target.
NOW, what is your Question? 


  First of all, I searched for the voltage of each LED, but I found a
  lot of tables with different information, so I found a video in
  portuguese in youtube with a small circuit to find the voltage of a
  LED.


I previously told you; to calculate the Vf all you needed to do was measure the voltage on both sides of the resistor.




  I'm sorry for my miss explanation, each LED has your own resistor.


If each LED has its own resistor then your explanation that you changed one of two blue LEDs to a red and the existing blue LED began blinking makes no sense. 

You began with two separate circuits both blue.
In your original posting you said your replaced a blue with a red and the other blue began blinking.
How can changing the LED in one circuit affect the other causing it to blink?
Original you said it was mouse with the two blue LEDs.  Now you seem to be using another PCB and the issue is not longer about blinking. 

Now you state the supply is 5V and 5.14V and the resistors are 100 Ω and 220 Ω and the original 68R (68 Ω) no longer exists.  

Do you want to know why the blue LED started blinking
Or do you want to know how to calculate a resistor value which in that case this question should be closed as a duplicate. 

It should also be closed because you are no longer asking a question. 




Regarding the original question I assume that was this circuit with two blue LEDs rather than an "empty" LED. 

 

This circuit would work with two blue LEDs and would not likely work with a red and blue. Adding a red could cause the blue to blink as explained in my original answer to the original question.   

END OF UPDATE


  changed one to a red led and its fine, the other led started to blink
  after changed.


I am assuming you have two LEDs getting their current from the same resistor.
If each LED had its own resistor there would be no problem. 

You do not have to change the resistor.
You need to use a blue LED.  

If there is only one resistor, both anodes of the LEDs are wired together to the resistor. 

The red LED's forward voltage is about 2V and the blue is about 3V.
Because they are connected together they both must be at the same voltage.
They are fighting with one another. The red one is winning the fight.  

Use a blue LED and they will both be closer to the same forward voltage.
Ideally both blue LEDs should be identical but any blue LED will work MUCH better than a red.  




  two blue small leds connected to a resistor each one (160R)


This is a little unclear. Is it each LED to one or one resistor each LED?
I assumed one resistor for both LEDs. 

If each has its own resistor then a piece of the puzzle is missing.
In this case there should be no issue with the blue LED.