pixel

Returns a colour component of one pixel on the screen.

Keyboard Maestro: PIXEL

Details #

pixel(component, x, y) takes exactly three arguments and returns a number.

x and y are screen coordinates in points from the top left of the main screen. component (not case-sensitive) is one of:

component	range
`red` (or `r`), `green` (or `g`), `blue` (or `b`) (or `b`)	0 to 255
`hue` (or `h`)	0 to 360
`saturation` (or `s`), `brightness` (or `v`)	0 to 100
`alpha` (or `a`)	0 to 100

The colour is read in sRGB and rounded to a whole number.

Takes 3 arguments. {{ pixel(text, b, c) }}

pixel("red", 10, 10)

→ 0

pixel("brightness", mouseX(), mouseY())

→ 0

Reads the screen, so it needs Screen Recording permission. If the pixel can't be read, or x and y aren't numbers, or the component is unknown, it returns 0, which is also a real answer for black, so check the permission before trusting a 0.
It captures one pixel each call; a loop over many pixels is slow.