Blue Screen
Display a full-screen blue color. Useful for checking screen uniformity, dead pixels, backlight bleed, and color accuracy on blue backgrounds.
#0000FF
Uses for blue screen
Dead pixel detection: look for pixels that do not display blue correctly.
Screen uniformity: check for uneven brightness or color patches.
Backlight bleed: especially visible on dark and solid color screens (LCD).
Color accuracy: compare how blue looks versus reference images.