Or a bookmarklet like this one:

    javascript:(function(){function%20R(w){try{var%20d=w.document,j,i,t,T,N,b,r=1,C;for(j=0;t=["object","embed","applet","iframe"][j];++j){T=d.getElementsByTagName(t);for(i=T.length-1;(i+1)&&(N=T[i]);--i)if(j!=3||!R((C=N.contentWindow)?C:N.contentDocument.defaultView)){b=d.createElement("div");b.style.width=N.width;%20b.style.height=N.height;b.innerHTML="<del>"+(j==3?"third-party%20"+t:t)+"</del>";N.parentNode.replaceChild(b,N);}}}catch(E){r=0}return%20r}R(self);var%20i,x;for(i=0;x=frames[i];++i)R(x)})();%20javascript:(function(){var%20newSS,%20styles='*%20{%20background:%20white%20!%20important;%20color:%20black%20!important%20}%20:link,%20:link%20*%20{%20color:%20#0000EE%20!important%20}%20:visited,%20:visited%20*%20{%20color:%20#551A8B%20!important%20}';%20if(document.createStyleSheet)%20{%20document.createStyleSheet("javascript:'"+styles+"'");%20}%20else%20{%20newSS=document.createElement('link');%20newSS.rel='stylesheet';%20newSS.href='data:text/css,'+escape(styles);%20document.getElementsByTagName("head")[0].appendChild(newSS);%20}%20})();%20javascript:(function(){var%20d=document;%20function%20K(N,w)%20{%20var%20nn%20=%20d.createElement(w),%20C%20=%20N.childNodes,%20i;%20for(i=C.length-1;i>=0;--i)%20nn.insertBefore(C[i],nn.childNodes[0]);%20N.parentNode.replaceChild(nn,N);%20}%20function%20Z(t,w)%20{%20var%20T%20=%20document.getElementsByTagName(t),%20j;%20for%20(j=T.length-1;j>=0;--j)%20K(T[j],w);%20}%20Z("blink",%20"span");%20Z("marquee",%20"div");%20})();%20javascript:(function(){var%20H=["mouseover","mouseout","unload","resize"],o=window.opera;%20if(document.addEventListener/*MOZ*/&&!o)%20for(j%20in%20H)document.addEventListener(H[j],function(e){e.stopPropagation();},true);%20else%20if(window.captureEvents/*NS4*/&&!o)%20{%20document.captureEvents(-1/*ALL*/);for(j%20in%20H)window["on"+H[j]]=null;}%20else/*IE*/%20{function%20R(N){var%20i,x;for(j%20in%20H)if(N["on"+H[j]]/*NOT%20TEXTNODE*/)N["on"+H[j]]=null;for(i=0;x=N.childNodes[i];++i)R(x);}R(document);}})();%20javascript:(function()%20{%20var%20c,%20tID,%20iID;%20tID%20=%20setTimeout(function(){},%200);%20for%20(c=1;%20c<1000%20&&%20c<=tID;%20++c)%20clearTimeout(tID%20-%20c);%20iID%20=%20setInterval(function(){},1000);%20for%20(c=0;%20c<1000%20&&%20c<=iID;%20++c)%20clearInterval(iID%20-%20c);%20})();

which strips out basically all the ill-considered design choices you're likely to find on a page, including best-of-1993 color palettes like that under discussion here.

If you don't want to go that route, most modern browsers have a reader function built in, which extracts the page content and displays it with high contrast, a readable font, and no annoyances.