Color Scales

I use both AutoCAD and Photoshop to create maps.  I often have trouble predicting printed results for autocad because it doesnt offer some of the features like monitor calibration etc.  Im not familiar with hex charts or color number charts at all.  Is there a website or something that can help me out.  The color I want to be diplayed in Autocad comes up as FFF9A5, however Autocad uses a number like 255,255,163.  How do I convert FFF9A5 to a number I can use in Autocad.  In general, I find this color matching stuff very confusing.

Thanks,

Bill
LVL 11
BillPowellAsked:
Who is Participating?
 
spiderfixCommented:
You can run this...save in Notepad as *.html

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<html>
<head>
<title>color converter</title>
<script language="JavaScript">
redValue = 255;
blueValue = 255;
greenValue = 255;
redForeValue = 0;
blueForeValue = 0;
greenForeValue = 0;
maxValue = 255;
hexValues = new Array("0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F");
i = 0;
function toHex(integer) {
hexDigit1 = Math.floor(integer / 16);
hexDigit2 = (integer % 16);
return hexValues[hexDigit1] + hexValues[hexDigit2];
}
function shiftFG() {
redFGHex = toHex(redForeValue);
blueFGHex = toHex(blueForeValue);
greenFGHex = toHex(greenForeValue);
bigFGHex = redFGHex + greenFGHex + blueFGHex;
document.fgColor = bigFGHex;
document.Interface.fgHex.value = bigFGHex;
document.Interface.redFG.value = redForeValue;
document.Interface.blueFG.value = blueForeValue;
document.Interface.greenFG.value = greenForeValue;
}
function shiftBG() {
redHex = toHex(redValue);
blueHex = toHex(blueValue);
greenHex = toHex(greenValue);
bigHex = redHex + greenHex + blueHex;
document.bgColor = bigHex;
document.Interface.bgHex.value = bigHex;
document.Interface.red.value = redValue;
document.Interface.blue.value = blueValue;
document.Interface.green.value = greenValue;
}
function incrementRed(isBackground) {
if (isBackground == true ) {
redValue = redValue + 8;
if (redValue > maxValue) {
redValue = 0;
}
shiftBG();
}
if (isBackground == false) {
redForeValue = redForeValue + 8;
if (redForeValue > maxValue) {
redForeValue = 0;
}
shiftFG();
   }
}
function decrementRed(isBackground) {
if (isBackground == true) {
redValue = redValue - 8;
if (redValue < 0 ) {
redValue = 255;
}
shiftBG();
}
else {
redForeValue = redForeValue - 8;
if (redForeValue < 0) {
redForeValue = 255;
}
shiftFG();
   }
}
function setRed(value, isBackground) {
if(value > -1 && value < 256) {
if( isBackground == true ) {
redValue = value;
shiftBG();
}
else {
redForeValue = value;
shiftFG();
      }
   }
}
function incrementBlue(isBackground) {
if ( isBackground == true ) {
blueValue = blueValue + 8;
if (blueValue > maxValue) {
blueValue = 0;
}                  
shiftBG();
}
else {
blueForeValue = blueForeValue + 8;
if ( blueForeValue > maxValue ) {
blueForeValue = 0;
}
shiftFG();
   }
}
function decrementBlue(isBackground) {
if (isBackground == true) {
blueValue = blueValue - 8;
if (blueValue < 0) {
blueValue = 255;
}
shiftBG();
}
else {
blueForeValue = blueForeValue - 8;
if (blueForeValue < 0) {
blueForeValue = 255;
}
shiftFG();
   }
}
function setBlue(value, isBackground) {
if (value > -1 && value < 256) {
if ( isBackground == true ) {
blueValue = value;
shiftBG();
}
else {
blueForeValue = value;
shiftFG();
      }
   }
}
function incrementGreen(isBackground) {
if (isBackground == true) {
greenValue = greenValue + 8;
if (greenValue > maxValue) {
greenValue = 0;
}
shiftBG();
}
else {
greenForeValue = greenForeValue + 8;
if (greenForeValue > maxValue) {
greenForeValue = 0;
}
shiftFG();
   }
}
function decrementGreen(isBackground) {
if (isBackground == true) {
greenValue = greenValue - 8;
if (greenValue < 0 ) {
greenValue = 255;
}
shiftBG();
}
else {
greenForeValue = greenForeValue - 8;
if (greenForeValue < 0) {
greenForeValue = 255;
}
shiftFG();
   }
}
function setGreen(value, isBackground) {
if ( value > -1 && value < 256 ) {
if ( isBackground == true ) {
greenValue = value;
shiftBG();
}
else {
greenForeValue = value;
shiftFG();
      }
   }
}
function unHex(string, fgbg) {
hex = string.toUpperCase();
counter = 0;
while (hex.charAt(0) != hexValues[counter])
counter++;
r = 16 * counter;
counter = 0;
while (hex.charAt(1) !=  hexValues[counter])
counter++;
r = r + counter;
counter = 0;
while (hex.charAt(2) != hexValues[counter])
counter++;
g = 16 * counter;
counter = 0;
while (hex.charAt(3) != hexValues[counter])
counter++;
g = g + counter;
counter = 0;
while (hex.charAt(4) != hexValues[counter])
counter++;
b = 16 * counter;
counter = 0;
while (hex.charAt(5) != hexValues[counter])
counter++;
b = b + counter;
if (fgbg == "bg") {
redValue = r;
blueValue = b;
greenValue = g;
document.Interface.red.value = redValue;
document.Interface.blue.value = blueValue;
document.Interface.green.value = greenValue;
}
if (fgbg == "fg") {
redForeValue = r;
blueForeValue = b;
greenForeValue = g;
document.Interface.redFG.value = redForeValue;
document.Interface.blueFG.value = blueForeValue;
document.Interface.greenFG.value = greenForeValue;
   }
}      
function validChar(char) {
for (j = 0; j < hexValues.length; j++) {
if (char == hexValues[j]) {
return true;
   }
}
return false;
}
function isHex(string) {
if (string.length != 6) {
return false;
}
for (k = 0; k < 6; k++) {
if (! validChar(string.charAt(k))) {
return false;
   }
}
return true;
}
function setBGHex(value) {
if (isHex(value.toUpperCase())) {
document.bgColor = value;
unHex(value, "bg");
   }
}
function setFGHex(value) {
if (isHex(value.toUpperCase())) {
document.fgColor = value;
unHex(value, "fg");
   }
}
</script>

</head>
<body>
<center>
<form name=Interface>
<table border=4 cellspacing=0 cellpadding=4>
<tr>
<td colspan=3 align=center>Background</td>
<td><input type=text name=bgHex onKeyup="setBGHex(this.value)"></td>
<td colspan=2 align=center>Foreground</td>
<td><input type=text name=fgHex onKeyup="setFGHex(this.value)"></td>
</tr>
<tr>
<td>Red</td>
<td><input type=button value=" + " onClick="incrementRed(true)"></td>
<td><input type=button value=" - " onClick="decrementRed(true)"></td>
<td><input type=text name="red" onKeyup="setRed(this.value, true)"></td>
<td><input type=button value=" + " onClick="incrementRed(false)"></td>
<td><input type=button value=" - " onClick="decrementRed(false)"></td>
<td><input type=text name=redFG onKeyup="setRed(this.value, false)"></td>
</tr>
<tr>
<td>Green</td>
<td><input type=button value=" + " onClick="incrementGreen(true)"></td>
<td><input type=button value=" - " onClick="decrementGreen(true)"></td>
<td><input type=text name="green" onKeyup="setGreen(this.value, true)"></td>
<td><input type=button value=" + " onClick="incrementGreen(false)"></td>
<td><input type=button value=" - " onClick="decrementGreen(false)"></td>
<td><input type=text name=greenFG onKeyup="setGreen(this.value, false)"></td>
</tr>
<tr>
<td>Blue</td>
<td><input type=button value=" + " onClick="incrementBlue(true)"></td>
<td><input type=button value=" - " onClick="decrementBlue(true)"></td>
<td><input type=text name="blue" onKeyup="setBlue(this.value, true)"></td>
<td><input type=button value=" + " onClick="incrementBlue(false)"></td>
<td><input type=button value=" - " onClick="decrementBlue(false)"></td>
<td><input type=text name=blueFG onKeyup="setBlue(this.value, false)"></td>
</tr>
</table>
</form></center>
</body>
</html>
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0
 
spiderfixCommented:
I just ran that FFF9A5 in the little JavaScript ditty, it converts to
R = 255
G = 249
B = 165
0
 
BillPowellAuthor Commented:
OK.  Seems good.  Should there be a button to initiate the conversion.  When I paste FFF9A5 into the box at the top, theres no effect on the RGB values.  However,  if I put values in the RGB boxes, it displays the correct number in the top box.  Am I reading this right.

Bill
0
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spiderfixCommented:
The RGB values should show up automatically.

Try my online one and match the source code to the one you made.

http://seafoods.hypermart.net/hex_color/color_converter.html

hypermart is going to throw some popups and/or inject some code
into the page so be aware of that addition of code.
0
 
BillPowellAuthor Commented:
OK, I see, your using the onKeyup event.  I was pasting a value into the textbox so the event did not fire unless I type it in manually.
0
 
spiderfixCommented:
Pasting should be working in those cells as well as typing it out.

What O/S are you using?
What browser?
0
 
BillPowellAuthor Commented:
Ive tried this on:

Windows 2000
Windows ME

IE 6

But you know what, I know enough html and javascript to take it from here.  Thanks for your help.

Bill
0
 
spiderfixCommented:
Sounds good, glad to help.
0
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