You may actually be seeing the prismatic effect of a projector headlamp.

You see this often right at the transition point like when a car is coming at you on uneven road. You get that flicker of blue, usually. Sometimes it’s rainbow. It depends on the lens and the focus of the cutoff shield.

When your behind the wheel you don’t see that slim little region. You see white.

Before I got into LED bulbs a few years ago, I was doing hid projector retrofits for a long time.

With leds, there is no market I know of for buying the specific replacement leds used in these lights. If I could buy raw leds in a more neutral color, I would. Then just reflow them into place. My current ones are not overly blue, luckily.