JS函数计算补色?

有人知道吗,您很想知道一种用于计算十六进制值的互补色的Javascript解决方案?

网络上有许多颜色选择套件和调色板生成器,但是我还没有看到使用JS实时计算颜色的工具。

详细的提示或摘要将不胜感激。

回答:

// Complement

temprgb={ r: 0, g: 0xff, b: 0xff }; // Cyan

temphsv=RGB2HSV(temprgb);

temphsv.hue=HueShift(temphsv.hue,180.0);

temprgb=HSV2RGB(temphsv);

console.log(temprgb); // Complement is red (0xff, 0, 0)

function RGB2HSV(rgb) {

hsv = new Object();

max=max3(rgb.r,rgb.g,rgb.b);

dif=max-min3(rgb.r,rgb.g,rgb.b);

hsv.saturation=(max==0.0)?0:(100*dif/max);

if (hsv.saturation==0) hsv.hue=0;

else if (rgb.r==max) hsv.hue=60.0*(rgb.g-rgb.b)/dif;

else if (rgb.g==max) hsv.hue=120.0+60.0*(rgb.b-rgb.r)/dif;

else if (rgb.b==max) hsv.hue=240.0+60.0*(rgb.r-rgb.g)/dif;

if (hsv.hue<0.0) hsv.hue+=360.0;

hsv.value=Math.round(max*100/255);

hsv.hue=Math.round(hsv.hue);

hsv.saturation=Math.round(hsv.saturation);

return hsv;

}

// RGB2HSV and HSV2RGB are based on Color Match Remix [http://color.twysted.net/]

// which is based on or copied from ColorMatch 5K [http://colormatch.dk/]

function HSV2RGB(hsv) {

var rgb=new Object();

if (hsv.saturation==0) {

rgb.r=rgb.g=rgb.b=Math.round(hsv.value*2.55);

} else {

hsv.hue/=60;

hsv.saturation/=100;

hsv.value/=100;

i=Math.floor(hsv.hue);

f=hsv.hue-i;

p=hsv.value*(1-hsv.saturation);

q=hsv.value*(1-hsv.saturation*f);

t=hsv.value*(1-hsv.saturation*(1-f));

switch(i) {

case 0: rgb.r=hsv.value; rgb.g=t; rgb.b=p; break;

case 1: rgb.r=q; rgb.g=hsv.value; rgb.b=p; break;

case 2: rgb.r=p; rgb.g=hsv.value; rgb.b=t; break;

case 3: rgb.r=p; rgb.g=q; rgb.b=hsv.value; break;

case 4: rgb.r=t; rgb.g=p; rgb.b=hsv.value; break;

default: rgb.r=hsv.value; rgb.g=p; rgb.b=q;

}

rgb.r=Math.round(rgb.r*255);

rgb.g=Math.round(rgb.g*255);

rgb.b=Math.round(rgb.b*255);

}

return rgb;

}

//Adding HueShift via Jacob (see comments)

function HueShift(h,s) {

h+=s; while (h>=360.0) h-=360.0; while (h<0.0) h+=360.0; return h;

}

//min max via Hairgami_Master (see comments)

function min3(a,b,c) {

return (a<b)?((a<c)?a:c):((b<c)?b:c);

}

function max3(a,b,c) {

return (a>b)?((a>c)?a:c):((b>c)?b:c);

}

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