ok, ive made a few codes so all these do is set the color of the background to a new color. they are just like the black and white, but now they are colors. here you go.
javascript:(function(){var newSS, styles='* { background: hotpink ! important; color: black !important } :link, :link * { color: green !important } :visited, :visited * { color: #FFFFFF !important }'; if(document.createStyleSheet) { document.createStyleSheet("javascript:'"+styles+"'"); } else { newSS=document.createElement('link'); newSS.rel='stylesheet'; newSS.href='data:text/css,'+escape(styles); document.getElementsByTagName("head")[0].appendChild(newSS); } })(); PINK
javascript:(function(){var newSS, styles='* { background: red ! important; color: Black !important } :link, :link * { color: blue !important } :visited, :visited * { color: #FFFFFF !important }'; if(document.createStyleSheet) { document.createStyleSheet("javascript:'"+styles+"'"); } else { newSS=document.createElement('link'); newSS.rel='stylesheet'; newSS.href='data:text/css,'+escape(styles); document.getElementsByTagName("head")[0].appendChild(newSS); } })(); RED
javascript:(function(){var newSS, styles='* { background: orange! important; color: black !important } :link, :link * { color: purple !important } :visited, :visited * { color: #FFFFFF !important }'; if(document.createStyleSheet) { document.createStyleSheet("javascript:'"+styles+"'"); } else { newSS=document.createElement('link'); newSS.rel='stylesheet'; newSS.href='data:text/css,'+escape(styles); document.getElementsByTagName("head")[0].appendChild(newSS); } })(); ORANGE
javascript:(function(){var newSS, styles='* { background: yellow ! important; color: black !important } :link, :link * { color: purple !important } :visited, :visited * { color: #FFFFFF !important }'; if(document.createStyleSheet) { document.createStyleSheet("javascript:'"+styles+"'"); } else { newSS=document.createElement('link'); newSS.rel='stylesheet'; newSS.href='data:text/css,'+escape(styles); document.getElementsByTagName("head")[0].appendChild(newSS); } })(); YELLOW
javascript:(function(){var newSS, styles='* { background: Green ! important; color: white !important } :link, :link * { color: yellow !important } :visited, :visited * { color: #FFFFFF !important }'; if(document.createStyleSheet) { document.createStyleSheet("javascript:'"+styles+"'"); } else { newSS=document.createElement('link'); newSS.rel='stylesheet'; newSS.href='data:text/css,'+escape(styles); document.getElementsByTagName("head")[0].appendChild(newSS); } })(); GREEN
javascript:(function(){var newSS, styles='* { background: turquoise ! important; color: black !important } :link, :link * { color: yellow !important } :visited, :visited * { color: #551A8B !important }'; if(document.createStyleSheet) { document.createStyleSheet("javascript:'"+styles+"'"); } else { newSS=document.createElement('link'); newSS.rel='stylesheet'; newSS.href='data:text/css,'+escape(styles); document.getElementsByTagName("head")[0].appendChild(newSS); } })(); TURQUOISE
javascript:(function(){var newSS, styles='* { background: blue ! important; color: white !important } :link, :link * { color: green !important } :visited, :visited * { color: #FFFFFF !important }'; if(document.createStyleSheet) { document.createStyleSheet("javascript:'"+styles+"'"); } else { newSS=document.createElement('link'); newSS.rel='stylesheet'; newSS.href='data:text/css,'+escape(styles); document.getElementsByTagName("head")[0].appendChild(newSS); } })(); BLUE
javascript:(function(){var newSS, styles='* { background: purple ! important; color: white !important } :link, :link * { color: yellow !important } :visited, :visited * { color: #FFFFFF !important }'; if(document.createStyleSheet) { document.createStyleSheet("javascript:'"+styles+"'"); } else { newSS=document.createElement('link'); newSS.rel='stylesheet'; newSS.href='data:text/css,'+escape(styles); document.getElementsByTagName("head")[0].appendChild(newSS); } })(); PURPLE
javascript:(function(){var newSS, styles='* { background: grey ! important; color: black !important } :link, :link * { color: white !important } :visited, :visited * { color: #FFFFFF !important }'; if(document.createStyleSheet) { document.createStyleSheet("javascript:'"+styles+"'"); } else { newSS=document.createElement('link'); newSS.rel='stylesheet'; newSS.href='data:text/css,'+escape(styles); document.getElementsByTagName("head")[0].appendChild(newSS); } })(); GREY