script.js

let ndvi = (B08 - B04) / (B08 + B04);

return colorBlend(ndvi,
   [-0.2, 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0 ],
   [[0, 0, 0],							   //  < -.2 = #000000 (black)
    [165/255,0,38/255],        //  -> 0 = #a50026
    [215/255,48/255,39/255],   //  -> .1 = #d73027
    [244/255,109/255,67/255],  //  -> .2 = #f46d43
    [253/255,174/255,97/255],  //  -> .3 = #fdae61
    [254/255,224/255,139/255], //  -> .4 = #fee08b
    [255/255,255/255,191/255], //  -> .5 = #ffffbf
    [217/255,239/255,139/255], //  -> .6 = #d9ef8b
    [166/255,217/255,106/255], //  -> .7 = #a6d96a
    [102/255,189/255,99/255],  //  -> .8 = #66bd63
    [26/255,152/255,80/255],   //  -> .9 = #1a9850
    [0,104/255,55/255]         //  -> 1.0 = #006837
   ]);

/* Alternative visualization as used in Sentinel Playground
if (ndvi<-0.2) return [0,0,0];
else if (ndvi<-0.1) return [1,0,0];
else if (ndvi<0) return [0.5,0.6,0,0];
else if (ndvi<0.1) return [0.4,0,0];
else if (ndvi<0.2) return [1,1,0.2];
else if (ndvi<0.3) return [0.8,0.8,0.2];
else if (ndvi<0.4) return [0.4,0.4,0];
else if (ndvi<0.5) return [0.2,1,1];
else if (ndvi<0.6) return [0.2,0.8,0.8];
else if (ndvi<0.7) return [0,0.4,0.4];
else if (ndvi<0.8) return [0.2,1,0.2];
else if (ndvi<0.9) return [0.2,0.8,0.2];
else return [0,0.4,0];
*/
/* Alternative visualization as used in EO Browser
if (ndvi<-1.1) return [0,0,0];
else if (ndvi<-0.2) return [0.75,0.75,0.75];
else if (ndvi<-0.1) return [0.86,0.86,0.86];
else if (ndvi<0) return [1,1,0.88];
else if (ndvi<0.025) return [1,0.98,0.8];
else if (ndvi<0.05) return [0.93,0.91,0.71];
else if (ndvi<0.075) return [0.87,0.85,0.61];
else if (ndvi<0.1) return [0.8,0.78,0.51];
else if (ndvi<0.125) return [0.74,0.72,0.42];
else if (ndvi<0.15) return [0.69,0.76,0.38];
else if (ndvi<0.175) return [0.64,0.8,0.35];
else if (ndvi<0.2) return [0.57,0.75,0.32];
else if (ndvi<0.25) return [0.5,0.7,0.28];
else if (ndvi<0.3) return [0.44,0.64,0.25];
else if (ndvi<0.35) return [0.38,0.59,0.21];
else if (ndvi<0.4) return [0.31,0.54,0.18];
else if (ndvi<0.45) return [0.25,0.49,0.14];
else if (ndvi<0.5) return [0.19,0.43,0.11];
else if (ndvi<0.55) return [0.13,0.38,0.07];
else if (ndvi<0.6) return [0.06,0.33,0.04];
else return [0,0.27,0];
/*