The key aspect to contemplate to achieve accessibility, aside from impaired vision, is by being aware that your design might be manipulated by assistive technology. Screen readers or magnifiers are examples of this. They are software physically disabled employ to enhance their experience of user interfaces. Some Web users can only read a certain combination such as yellow text on a black background, which allows no room for greyscale.

In order to have good legibility for users with certain visual difficulties and impairments, strong contrast can be a main ingredient in your design. Test effectivity of this by manipulating screenshots of your design in a program like Adobe Photoshop. Try converting image to greyscale then make screenshot monochrome to see how it might be viewed using most extreme visual manipulation -- do this by increasing contrast level to +100. This is a particularly useful approximation of difficulties colour blind users may experience in discerning one colour or shade from another.

You can start adjusting your color application now and keep in mind that your designs will not be considered impressive if few people could discern them. -30-

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A simple color wheel is most critical tool you can use in order to mix colors and eventually gain a painter’s way of thinking regarding to color and color combinations. You also have to know principles in understanding three main sets of color schemes from color wheel. These three main sets are analogous, complimentary, and monochromatic.

Analogous - adjacent to each other on color wheel. If you pick any range of colors between two points of either triangle on our color wheel (ie yellow to red, orange to violet, red to blue, etc), you will have an analogous color scheme.

Complementary - consist of colors located opposite each other on color wheel, such as green and red, yellow and violet, or orange and blue. But don’t ever commit error of placing complementary colors on top of one another. Some colors are also not directly analogous but are not complementary either. Watch out for colors like cyan and red.

Monochromatic – is when you create an imaging using only tints and shades of one color.

Many variations of these three color schemes has been coordinated since. But these three are foundation principles. Basically, in order to understand color and come up with nice color combinations for Web design and application, just keep your eyes open and befriend color wheel! -30-

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