Color or colour (see spelling differences) is a property of light that is determined by its wavelength (or by its composition as a blend of several wavelengths). The range of visible wavelengths of light is known as the visible spectrum, or simply the spectrum.
The term color may also refer to a property of objects or materials, determined by which wavelengths of light they reflect, transmit, or emit. Typically only features of the composition of light that are detectable by humans are included, so color may also be considered a psychological phenomenon. Regimenting these various uses of the term is a major task in current philosophy.
Since perception of color stems from the varying sensitivity of different types of cone cells in the retina to different parts of the spectrum, colors may be defined by the degree to which they stimulate these cells. The physiology of color is discussed below.
More on [ Color ]

216 Color Webmaster's Palette Color Lab - Designer's color scheme lab. Choose colors by clicking on the hue-symmetrical color wheel on the left. Choices appear side-by-side on the right with hexadecimal html and decimal rgb codes and all text / background combinations. Each shading series, colors ranging from light to dark, lies along a straight line in the color wheel.
Meta Description: [ Color scheme picker for web designers. See all the web-safe colors on the left. Pick by clicking. See your choices on the right with hex and decimal codes and all text / background combinations. Click on the little 'X's to delete a choice. ]
216 Web Safe Colors - Three charts of the safe colors. Each chart explores the effect of Red, Green or Blue on the RGB value, expressed in hexadecimal notation.
Meta Description: [ RGB values of 216 web-safe colors ]
About Web Color Definitions - Web colors in Hex, RGB, MSAccess and VBA. With RGB to Hex converter, color cubez, 216 safe colors, and HTML tutorial links.
Meta Description: [ About Web Color Definitions - Web colors in Hex, RGB, MSAccess & VBA. ]
Background Color Gallery - These background color images are available for use on UC Berkeley Library Web pages. The appropriate mark-up to use in HTML documents to access a particular background color is listed directly below each image.
Browsersafe Colours - A javascript illustration of the 216 basic colors and their codes, plus a suggestion that there are perhaps only 212 or 8 safe ones.
Meta Description: [ Showing the Browsersafe colours and their codes, by using Javascript. By Henry Bottomley ]
Color Blender - Takes two user-defined valid colors and creates a palette using a set number of points between the colors.
Color Chart by Owens4 - An alphabetical listing of color names that give both a hexadecimal and RGB color code, when selected. Also, works as a solid color background tester for text.
Color Management for the World Wide Web - A case study in color management for distributed digital media.
Meta Description: [ The International Color Consortium....promoting and encouraging the standardization of an open color management system ]
Color Palette Creator - Uses blended colors and transparency to create color schemes.
Meta Description: [ A color swatch generator based on the tutorial located here: http://www.stuffandnonsense.co.uk/archives/creating_colour_palettes.html ]
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Color Picker 2.0 Netscape Feature Story - Article describing the Color Picking Tool and information on how to arrive at web save colors, by Michael Bostock.
Color Scheme Generator - Palette creator based on use of a color wheel.
Colors 4 Webmasters - Colorpicker, choose the right combination of colors from the websafe palette, name palette, colorsets. Generate CSS-code, user-friendly interface to try different color combination. Note: May not support some browsers.
Meta Description: [ NB-safecolor is a unique color tool. It allows you to choose the right combination of colors for a webpage, either by choosing from a websafe/named colorpalette, pre-defined colorsets or by specifying RGB/HEX-values. Easy copy and paste of CSS-code with the color layout to your editor. Features a... ]
Colorspeak - An experiment to explore how colors are perceived and associate with the so-called safe palette.
Meta Description: [ The idea here is that we view the world through the web more than we ever have - colorspeak is an experiment to explore how we perceive and associate the colors of the so-called safe palette with words, sounds, people, emotions, and events in our own experience. ]
Colour My World - Shows how color is portrayed in art, nature, science, and fashion with many examples.
Meta Description: [ ThinkQuest is an international competition where student teams engage in collaborative, project-based learning to create educational websites. The winning entries form the ThinkQuest online library. ]
Colour Names - List of color (colour) names supported in HTML. How to use color numbers if one of the predefined names is not what is wanted.
Meta Description: [ List of colour (color) names supported in HTML and how to use colour numbers if one of the predefined names is not what you want. ]
Colours on the Web - Information on how to use colors on the web, provides color theory and a color wizard to choose matching colors.
Meta Description: [ Colors on the Web is an online resource for color theory and how it is used in web design. ]
Easy RGB - Match RGB and color data to real products and color collections. Convert color data and find color complements, schemes and harmonies.
Meta Description: [ EasyRGB.com provides the first RGB and COLOR search engine on the Web. All you need to match your RGB data with real products and color collections. ]
GoToMy(dot)com - A 400+ hexadecimal color chart.
Meta Description: [ Gotomy.com color chart, a rainbow of 400 plus Colors for your web page designs. ]
Hexagonal Hues - Web publisher's coloring book, with names and hex values for HTML colors.
Meta Description: [ Part of The Firm List network of sites listing web design and development firms from around the world. ]
HTML Color Chart - Browser-safe colors and color names.
Meta Description: [ Color Chart for Web Page Development.
Browser-Safe Colors and Color Names.
HTML color chart. ]
HTML Color Codes - All 216 web safe hexadecimal HTML color codes arranged by hue in a one-screen color wheel. Swatch library arrangement of colors. Decimal RGB chart also.
Meta Description: [ Chart of 216 web-safe colors with hex HTML codes, fitting on one screen. Free swatch libraries and color scheme design lab. Printed HTML color charts available. ]
Hype's Color Specifier for Netscape - Vertical chart of image bars with names, hexadecimal and RGB codes, includes an HTML page with the chosen color.
Marianne's Color Codes - Over 2000 colors and their hex codes to use in building HTML web sites, plus over 100 colors by name and a hexadecimal number conversion chart.
Meta Description: [ Almost 2000 colors and their hex codes to use in building HTML web sites. ]
moreCrayons - Resource for web designers and developers to test an expanded palette of 4,096 colors for the web. The web-smart palette pages show different demonstrations of the palette.
Meta Description: [ A bigger box of crayons for web designers and developers. Most web users can see thousands of colors. Here they are. ]
Netscape Color Map - Move mouse over hexagon palettes and the hexadecimal, RBG, percent and font color codes will appear. Click and move arrow to selected color to lock into place.
Non-dithering Colours - A table of the 216 non-dithering colors, with an explanation of dithering and an example of how text looks in different colors.
Oultwood Web Color Chart - HTML color chart showing which combinations are most suitable for web page design.
Meta Description: [ HTML colour chart< ]
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RGB Hex Colour Chart - A free, printer-friendly RGB Hex colour chart for web developers.
Safe Colors - A table of hex codes for browser and platform safe colors, which will work on any computer with a resolution of 256 colors or above.
The Browser-Safe Color Palette - Article about non-dithering colors in browsers, by Lynda Weinman.
Meta Description: [ lynda.com homepage for web designers and publishers ]
Unsafe Color Match - Create color themes beyond the safe color palette.
Meta Description: [ Unsafe Colormatch - create 24-bit color schemes online - beyond the so-called safe palette ]
Using Colour on the Web - A brief overview about how to effectively use red, green and blue, as well as the Websafe palette.
Meta Description: [ This is not meant as the definitive guide about colour -- or color -- on the Web, but rather a brief overview about how to effectively use red, green and blue, as well as the Websafe palette. ]
VisiBone - Printed references and free resources for web design, with Color, HTML, and Style Sheets. Free services include Color Lab, Swatch Libraries and all hexadecimal color codes on screen at once Decimal RGB version too.
Meta Description: [ Web Design Reference Guides: Color, HTML, CSS, special characters, etc. Posters, charts, laminated cards, mouse pads. Free online: color scheme lab, color-wheel swatch libraries, color tables, character references. ]
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Web Colors Homepage - A visual guide to choosing colors for web pages. Interactive palettes to experiment with the colors.
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Web Elfin Design Web Page Colors - Color chart of 216 Web Safe Colors. How to change RGB color shades one shade at a time in hex for photo editing. Hex to decimal conversion.
Meta Description: [ Web page design. Color combinations, 216 web safe colors, Hex to Decimal conversion, what is Hex? Low cost pre-formatted web page designs, sample web pages, custom designs, combination of both. ]
Web Safe Colors - A well organized listing of the 216 web safe colors.
Meta Description: [ Websafe color chart and palette ]
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