HSV to RGB color conversion - JavaScript-Port from the excellent java algorithm by Eugene Vishnevsky at http://www.cs.rit.edu/~ncs/color/t_convert.html

hsvToRgb.js

/**
* HSV to RGB color conversion
*
* H runs from 0 to 360 degrees
* S and V run from 0 to 100
*
* Ported from the excellent java algorithm by Eugene Vishnevsky at:
* http://www.cs.rit.edu/~ncs/color/t_convert.html
*/
function hsvToRgb(h, s, v) {
    var r, g, b;
    var i;
    var f, p, q, t;
     
    // Make sure our arguments stay in-range
    h = Math.max(0, Math.min(360, h));
    s = Math.max(0, Math.min(100, s));
    v = Math.max(0, Math.min(100, v));
     
    // We accept saturation and value arguments from 0 to 100 because that's
    // how Photoshop represents those values. Internally, however, the
    // saturation and value are calculated from a range of 0 to 1. We make
    // That conversion here.
    s /= 100;
    v /= 100;
     
    if(s == 0) {
        // Achromatic (grey)
        r = g = b = v;
        return [
            Math.round(r * 255), 
            Math.round(g * 255), 
            Math.round(b * 255)
        ];
    }
     
    h /= 60; // sector 0 to 5
    i = Math.floor(h);
    f = h - i; // factorial part of h
    p = v * (1 - s);
    q = v * (1 - s * f);
    t = v * (1 - s * (1 - f));
     
    switch(i) {
        case 0:
            r = v;
            g = t;
            b = p;
            break;
     
        case 1:
            r = q;
            g = v;
            b = p;
            break;
     
        case 2:
            r = p;
            g = v;
            b = t;
            break;
     
        case 3:
            r = p;
            g = q;
            b = v;
            break;
     
        case 4:
            r = t;
            g = p;
            b = v;
            break;
     
        default: // case 5:
            r = v;
            g = p;
            b = q;
    }
     
    return [
        Math.round(r * 255), 
        Math.round(g * 255), 
        Math.round(b * 255)
    ];
}

it's working perfectly, thank you so much!

It's not perfect.
There is a case 6, which results in the same as case 0.
Without it the output of hsvToRgb(360, 100, 100) results in rgb(255,0,255), which is obviously wrong, as it should result in the same as hsvToRgb(0, 100, 100).
Look here: https://de.wikipedia.org/wiki/HSV-Farbraum (I know its in German, but the math should be universal)

It's not perfect.
There is a case 6, which results in the same as case 0.

Limiting "i" to a max of 5 should solve the problem. 😄