Black as the foreground, and White as the background. I have seen blue appear as the foreground.
You can change these colours to every colour of the spectrum and beyond.
As far as I can see, there is no way to change the default colors.
gghgcccbnvc
Curves is adjustment in Photoshop where you can adjust colors and tones in an image.
photoshop,coreldraw
clone stamp
Orange, purple and green are the secondary colors that can be made out of primary colors. You cannot make black out of primary colors.
Image > Adjustments > Match Color
To select all colors in Photoshop at once, you can use the Magic Wand tool and set the Tolerance level to 0. This will allow you to select all colors in the image with a single click.
Primary light colors (red, green, blue) are additive colors that combine to create white light, while primary pigment colors (cyan, magenta, yellow) are subtractive colors that combine to create black. Mixing primary light colors results in brighter colors, while mixing primary pigment colors results in darker colors. Primary light colors are used in digital displays, while primary pigment colors are used in traditional printing methods.
#1 primary colors make additive colors
The app that shows colors in a picture is Photoshop.
Primary colors are called "primary" because they are fundamental colors that cannot be created by mixing other colors. They are considered the building blocks for all other colors in the color wheel. Mixing primary colors together can create a wide range of secondary and tertiary colors.
To isolate colors in Photoshop, you can use the "Select" menu and choose "Color Range." This tool allows you to select specific colors in an image by adjusting the range and fuzziness settings. Once you have selected the desired colors, you can create a new layer or mask to isolate them.