Depending on what you mean by “tint,” this is what you get in Photoshop if you take your color and bring its saturation down from 100% to 70%:
Currently, the color #ffb600 has an HSB (Hue, Saturation, Brightness) level of 43°, 100%, 100%.
If we take the saturation down to 70%, we get: #ffcc4d. It is the exact same hue (color) as the original, just more towards gray (or, in this case, white as our brightness is at 100%). So, basically, you’re looking at a scale in which you’re sliding from 255, 183, 0 to 255, 255, 255. I’m not 100% sure of the math, because color space math can get quite complex, but it looks like all Photoshop is doing here is moving the G and B channels proportionally closer to 255, depending on the saturation percentage.