What are the definitions of the colors that are in the Lightroom Histogram triangles?
I have just got into working with the Lightroom Histogram.
I understand the basics and how to apply the adjustments to eliminate the white triangle and get it to gray when the triangle lights up.
I am noticing that the Triangle will at times light up different colors such as :
Yellow, white, red.
What do the colors mean?
Eventually I get to have the triangle turn gray.
However : Am I making the right adjustment to get to the gray color when a color lights up other then white?
In other words:
if I change the whites/highlights is that the correct change or should it be exposure based on a color other then white that shows in the triangle.
I hope I explained my question properly, please ask any follow up questions if I failed to make the case for the question,
The triangles indicate that one or more channel has been clipped in shadows (left) or highlights (right).
When a channel has been clipped, there is no color from that channel present - i.e. the value is either 0 or 255.
Edit: Lightroom uses percent instead of levels for color values, so the number are 0 or 100%
red = red channel clipped
green = green channel clipped
blue = blue channel clipped
cyan = green and blue channels clipped
magenta = red and blue channels clipped
yellow = red and green channels clipped
light gray = all channels clipped
dark gray = no channels clipped
Unless you're working with images for scientific use, I would set shadows and highlights looking mostly at the image itself, rather than using the histogram. The histogram tells you a lot about the image at a glance, but there is no such thing as a "perfect histogram".
What I usually do is to hold down the Alt key while dragging the Highlights and Blacks sliders, which will show clipping in the image itself. I prefer not to have any clipped highlights (except specular highlights), and usually a little black clipping to have som real blacks in the image.
How set shadows and highlights in an image depends a lot on the nature of the image, and on personal preference.
Some images look better without any blacks or whites at all, like the one below.