flash - Turn off color ranges in Pixel Bender -

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what best way turn turn off (using pixelbender) colors fall within range. example, turn off colors between 0x0000ff , 0x00ffff. help. has work in flash. thanks!

if mean per channel "between", here simple way it.

<languageversion : 1.0;>  kernel untitled <   namespace : "your namespace";     vendor : "your vendor";     version : 1; > {     input image4 src;     output pixel4 dst;      parameter float rthreshold     <         minvalue: 0.0;         maxvalue: 1.0;         defaultvalue: 0.0;     >;      parameter float gthreshold     <         minvalue: 0.0;         maxvalue: 1.0;         defaultvalue: 0.0;     >;      parameter float bthreshold     <         minvalue: 0.0;         maxvalue: 1.0;         defaultvalue: 0.0;     >;      void     evaluatepixel()     {         pixel4 sourcepixel = samplenearest(src,outcoord());         if(sourcepixel.r <= rthreshold) sourcepixel.r = 0.0;         if(sourcepixel.g <= gthreshold) sourcepixel.g = 0.0;         if(sourcepixel.b <= bthreshold) sourcepixel.b = 0.0;         dst = sourcepixel;     } }

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