ClosestWebSafeColor(hexInput)
Last updated November 21, 2001
Version: 1 | Requires: ColdFusion 5 | Library: UtilityLib
Description:
Takes a hex color in, and returns the closest web safe hexadecimal color. Returns a NULL (empty) string if input hex string is invalid.
Thanks to Eric Carlisle (IsWebSafeColor)
Return Values:
Returns a string.
Example:
003366, #closestWebSafeColor('003366')#<br>
aabbcc, #closestWebSafeColor('aabbcc')#<br>
112233, #closestWebSafeColor('112233')#<br>
eeffgg, #closestWebSafeColor('eeffgg')#<br>
fffffcc, #closestWebSafeColor('fffffcc')#<br>
##c0c00c, #closestWebSafeColor('##c0c00c')#
</CFOUTPUT>
Parameters:
| Name | Description | Required |
|---|---|---|
| hexInput | Yes |
Full UDF Source:
<cfscript>
/**
* Returns the closest web safe hexadecimal color for a given hexadecimal color.
*
* @param hexInput
* @return Returns a string.
* @author Tony Brandner (brandner@canada.com)
* @version 1, November 21, 2001
*/
function closestWebSafeColor(hexInput) {
var cleanHexInput = replace(hexInput,'##','','ALL');
var hexOutput = '';
var i = 0;
if (Len(ReReplace(cleanHexInput, "[0-9abcdefABCDEF]", "","ALL")) eq 0 and Len(cleanHexInput) eq 6) {
for (i=1; i lte 5; i=i+2) {
closestMatch = 51 * Round((InputBaseN(mid(cleanHexInput,i,2),16)/51));
if (closestMatch eq 0) {
hexOutput = hexOutput & '00';
}
else {
hexOutput = hexOutput & FormatBaseN(closestMatch,16);
}
}
return hexOutput;
}
else {
return 'invalid';
}
}
</cfscript>
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