Flat color

Flat color design is a technique that uses simple effects – or lack thereof – to create a design scheme that does not include three-dimensional attributes. Effects such as drop shadows, bevels, embossing and gradients are not used in flat design projects. So it's come to flat colors. Here is the most common flat color works on all over common apps and website

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CSS COLORS

Over 140 css color code that support all systems and browers, just click to copy hex code or rgb code to applying to your website. 

Example

HEX CODE

<a style="background-color: #00ff00 ">Green</a>

RGB VALUE

Rgb stands for Red Green Blue

<a style="background-color: rgb(0,255,0) ">Green</a>

HSL VALUE

HSL stands for hue, saturation, and lightness

<a style="background-color: hsl(120,100%,100%) ">Green</a>

Brower for more css color code for your own purpose

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METRO COLORS

Metro UI and metro colors have gained a huge popularity across web and graphic designers and even Apple decided to create flat design UI for its mobile operating system since iOS7.

There are several metro color combinations and we decided to create a list of the most popular ones used in design. This resource also includes various color codes for use in any application, website or even text document.
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HTML Color Codes

HTML Color Codes website provides free color tools for finding HTML colors for your website. Great tools HTML color chart and HTML color picker will make this simple as a walk in the park.

To quickly start using HTML colors in your website take a look at How to use HTML color codes?. If you wish to learn what this combination of characters in HTML Color Codes actually means than take a look at section HTML Color Codes Theory.

Web safe colors is the list of colors that look the same on all operating systems. And if you have color blindness then check out HTML Color Names to overcome that problem.

Make sure you checkout a list of the best freeware software and online services for web developers.

HTML COLORS

HTML color codes are hexadecimal triplets representing the colors red, green, and blue (#RRGGBB). For example, in the color red, the color code is #FF0000, which is '255' red, '0' green, and '0' blue. These color codes can be used to change the color of the background, text, and tables on a web page.