This is dependent on the computer's operating system, the browser being use, and the individual user's preference settings. Browser safe palette is a set of 216 colors, made up from the cross-section of the Mac and Windows system palettes, that will not dither on Mac and Windows 8 bit displays. Design high-contrast graphics if you are concerned about users with grayscale or black and white displays. When colors are converted to grayscale values, only the brightness of the colors matters.
Monitors also vary in the brightness of their displays, known as the gamma value.
Likewise, graphics created on a PC may look washed out when viewed on a Mac. Fixed versus Flexible Web page design Web pages are flexible by default. The text and elements in a straightforward HTML file will flow into the browser window, filling all available space, regardless of the monitor size. When the browser window is resized, the elements reflow to adapt to the new dimensions. The whole monitor space is filled, without potentially awkward empty space left over by many fixed-width designs.