Why does the I-beam change from black to white?

The I‑beam and text cursor color in Windows 11 is controlled by the system’s accessibility and cursor settings. Recent Windows 11 changes emphasize higher visibility by automatically adapting cursor color to the background or to the configured text cursor/mouse pointer settings. This can cause the I‑beam to appear white on light backgrounds and black on dark backgrounds, which is why it may seem to “randomly” switch.

To control this behavior, adjust the text cursor and mouse pointer settings:

1. Open Accessibility settings: press Windows logo key+U or select Start > Settings > Accessibility.
2. For the text cursor:
   • Select Text cursor.
   • Turn on Text cursor indicator if better visibility is needed.
   • Use the Size slider and Recommended colors or Choose another color to pick an indicator color that stands out on white backgrounds.
3. For the mouse pointer (which also affects the text cursor color):
   • Select Mouse pointer and touch.
   • Under Mouse pointer, adjust Size as needed.
   • Under Mouse pointer style, choose White, Black, Inverted, or a bright custom color. The Inverted style in particular makes the pointer (and I‑beam) automatically invert against the background, which can reduce the “invisible on white” issue.

If the I‑beam is becoming hard to see because of other color changes (for example, color filters or inverted colors), review those settings as well:

1. Open Settings > System > Display and check Night light and other brightness/color options if screen colors look unusual or too bright.
2. Open Settings > Accessibility > Color filters and ensure Color filters are off if unintended inversion or grayscale is occurring.

These controls are part of the broader color and contrast accessibility features in Windows 11 designed to make text and cursors easier to see, but depending on configuration they can result in the I‑beam changing between black and white.

References:

• Use color and contrast for accessibility in Microsoft 365