You can also obtain colors with \usepackage{colordvi}. In that case you do \Red{this text will be in red}, etc.
Here is part of the description (as of Feb. 2005, see the file /usr/share/texmf/tex/plain/dvips/colordvi.tex, for the full story):
% This file can be used in any flavor of LaTeX (e.g. LaTeX, FoilTeX,
% AMS-LaTeX) by adding the keyword "colordvi" to the options in the
% \documentstyle command (e.g., "\documentstyle[colordvi]{foils}") or \input
% in any flavor of TeX (e.g. Plain TeX, eplain, AMS-TeX or any of the
% above LaTeX flavors) with the command "\input colordvi".
%
% The actual parameters for each color are determined by the device
% driver.
% For "dvips", that is the header file color.pro prepended to the
% output file by dvips. They can be overrriden by a user-supplied
% header, called by either the -h option or the "h" flag in a printer
% configuration file, or in the .dvipsrc (or its analogue on other
% systems).
%
% Most of the color names and their matches were based on the
% most recent (at time of writing) Crayola Crayon box of 64 colors.
%
% There are 68 predefined colors. At the end of this file is a
% listing of the color names and their approximate PANTONE color
% match. This is for reference purposes only.
and the colors:
% % Here are the color names and their PANTONE match (approximately) % \newColor GreenYellow % GreenYellow Approximate PANTONE 388 \newColor Yellow % Yellow Approximate PANTONE YELLOW \newColor Goldenrod % Goldenrod Approximate PANTONE 109 \newColor Dandelion % Dandelion Approximate PANTONE 123 \newColor Apricot % Apricot Approximate PANTONE 1565 \newColor Peach % Peach Approximate PANTONE 164 \newColor Melon % Melon Approximate PANTONE 177 \newColor YellowOrange % YellowOrange Approximate PANTONE 130 \newColor Orange % Orange Approximate PANTONE ORANGE-021 \newColor BurntOrange % BurntOrange Approximate PANTONE 388 \newColor Bittersweet % Bittersweet Approximate PANTONE 167 \newColor RedOrange % RedOrange Approximate PANTONE 179 \newColor Mahogany % Mahogany Approximate PANTONE 484 \newColor Maroon % Maroon Approximate PANTONE 201 \newColor BrickRed % BrickRed Approximate PANTONE 1805 \newColor Red % Red VERY-Approx PANTONE RED \newColor OrangeRed % OrangeRed No PANTONE match \newColor RubineRed % RubineRed Approximate PANTONE RUBINE-RED \newColor WildStrawberry % WildStrawberry Approximate PANTONE 206 \newColor Salmon % Salmon Approximate PANTONE 183 \newColor CarnationPink % CarnationPink Approximate PANTONE 218 \newColor Magenta % Magenta Approximate PANTONE PROCESS-MAGENTA \newColor VioletRed % VioletRed Approximate PANTONE 219 \newColor Rhodamine % Rhodamine Approximate PANTONE RHODAMINE-RED \newColor Mulberry % Mulberry Approximate PANTONE 241 \newColor RedViolet % RedViolet Approximate PANTONE 234 \newColor Fuchsia % Fuchsia Approximate PANTONE 248 \newColor Lavender % Lavender Approximate PANTONE 223 \newColor Thistle % Thistle Approximate PANTONE 245 \newColor Orchid % Orchid Approximate PANTONE 252 \newColor DarkOrchid % DarkOrchid No PANTONE match \newColor Purple % Purple Approximate PANTONE PURPLE \newColor Plum % Plum VERY-Approx PANTONE 518 \newColor Violet % Violet Approximate PANTONE VIOLET \newColor RoyalPurple % RoyalPurple Approximate PANTONE 267 \newColor BlueViolet % BlueViolet Approximate PANTONE 2755 \newColor Periwinkle % Periwinkle Approximate PANTONE 2715 \newColor CadetBlue % CadetBlue Approximate PANTONE (534+535)/2 \newColor CornflowerBlue % CornflowerBlue Approximate PANTONE 292 \newColor MidnightBlue % MidnightBlue Approximate PANTONE 302 \newColor NavyBlue % NavyBlue Approximate PANTONE 293 \newColor RoyalBlue % RoyalBlue No PANTONE match \newColor Blue % Blue Approximate PANTONE BLUE-072 \newColor Cerulean % Cerulean Approximate PANTONE 3005 \newColor Cyan % Cyan Approximate PANTONE PROCESS-CYAN \newColor ProcessBlue % ProcessBlue Approximate PANTONE PROCESS-BLUE \newColor SkyBlue % SkyBlue Approximate PANTONE 2985 \newColor Turquoise % Turquoise Approximate PANTONE (312+313)/2 \newColor TealBlue % TealBlue Approximate PANTONE 3145 \newColor Aquamarine % Aquamarine Approximate PANTONE 3135 \newColor BlueGreen % BlueGreen Approximate PANTONE 320 \newColor Emerald % Emerald No PANTONE match \newColor JungleGreen % JungleGreen Approximate PANTONE 328 \newColor SeaGreen % SeaGreen Approximate PANTONE 3268 \newColor Green % Green VERY-Approx PANTONE GREEN \newColor ForestGreen % ForestGreen Approximate PANTONE 349 \newColor PineGreen % PineGreen Approximate PANTONE 323 \newColor LimeGreen % LimeGreen No PANTONE match \newColor YellowGreen % YellowGreen Approximate PANTONE 375 \newColor SpringGreen % SpringGreen Approximate PANTONE 381 \newColor OliveGreen % OliveGreen Approximate PANTONE 582 \newColor RawSienna % RawSienna Approximate PANTONE 154 \newColor Sepia % Sepia Approximate PANTONE 161 \newColor Brown % Brown Approximate PANTONE 1615 \newColor Tan % Tan No PANTONE match \newColor Gray % Gray Approximate PANTONE COOL-GRAY-8 \newColor Black % Black Approximate PANTONE PROCESS-BLACK \newColor White % White No PANTONE match