Image: Gradient-optical-illusion
Size of this PNG preview of this SVG file: 800 × 581 pixels. Other resolution: 320 × 233 pixels.
Original image (SVG file, nominally 1,024 × 744 pixels, file size: 439 bytes)
Description: Simultaneous Contrast Illusion. The horizontal grey bar is the same shade throughout. Check this by covering everything except the bar.
Title: Gradient-optical-illusion
Credit: Own work
Author: Dodek
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC-BY-SA-3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0/
Attribution Required?: Yes
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