When i was a little kid, I was really scared of the dark. But then I came to understand, dark just means the absence of photons in the visible wavelength -- 400 to 700 nanometers. Then i thought, well, its really silly to be afraid of a lack of photons. Then i wasn't afraid of the dark anymore after that.
Elon Musk

caret-color

The caret-color CSS property sets the color of the insertion caret, the visible marker where the next character typed will be inserted. This is sometimes referred to as the text input cursor. The caret appears in elements such as <input> or those with the contenteditable attribute. The caret is typically a thin vertical line that flashes to help make it more noticeable. By default, it is black, but its color can be altered with this property.
caret-color css reference