Pink is not an exact color definition. But you can get a free or online color contrast analyzer and search a good color that you see as pink. I consider pink is pure RGB red RGB(255,0,0) (or as well #FF0000) mixed with so much white that the saturation is 50% or less and then maybe darkened. That's RGB(X,Y,Y) where X is something from 1 to 255. Minimum 1 makes it reddish. Green and blue components can be anything from 0 to X, but they must be equal (Y=0...X).
Here's an example. It's picked from Photoshop's color selector:
The found #BC8787 has the minimum contrast 3:1 against white.
Others can want the hue be something more blue that pure red. To find your own opinion you can adjust the hue from 360 degrees to as low as 340 degrees.
There's no actual need to use Photoshop to search the color, but it's handy because you can have the rest of the image under construction visible at the same time and see the actual color in the right context. Searching a color can well be done in color contrast analyzer only. As an advantage you can have transparency (=alpha less than the maximum). An example of the blueish variation (hue=341 degrees):
The HSV-system is the same polar version of RGB as Hue-saturation-brightness in Photoshop. Photoshop's brightness is often called value in other programs.
A competent mathematician would calculate the exact result, but I skip it due the lack of knowledge of contrast perception models.