how to determine the opposite of hex color values?

How can i determine the opposite value of a hex color code like EEEEEE ?

For EEFF99 it would be 99FFEE offcourse but how about the value from above?

And how can i easily view and compare a hex color to it's opposite?

Well, that wouldn't necessarily be the "opposite".

The opposite of #EEFF99 would be #110066 (#FFFFFF - #EEFF99).

What you're doing is reversing it.

With what you did to #EEFF99, using the same methodology, the opposite of #FFFFFF would be #FFFFFF (when it's actually #000000).

Of course, a colour (well, grey) like #808080 produces #808080 regardless of which method you used.

Reversed it's still #808080, and subtracted from #FFFFFF it's still #808080.

You could write a PHP script to work these out.

Simply remove the # from the beginning, then subtract the colour from FFFFFF.

Windows calculator (in hex mode, through scientific view) will allow you to do this too, if you want something you can just tap in manually.

Through windows calculator in scientific view my results was when i substracted 808080 from FFFFFF i got the result 7F7F7F

So what am i doing wrong here?




May i ask how you got this result? did you use the windows calculator?

You aren't doing anything wrong. The middle of the spectrum is actually 7FFFFF

Try subtracting that, and your result will be 7FFFFF

well, #808080 is 128,128,128 in decimal (half of 256).

But I neglected to take into account the fact that PCs start counting at 0, heh.

So, 127,127,127 would be half of 255,255,255.

127,127,127 is #7F7F7F.

7F == 127
80 == 128
FF == 255

ATNO : FFFFFF - 7FFFFF == 800000

WTF? I guess I am old. As an old school art major, we just used a color wheel, starting with the primary colors; red, blue, and yellow. If you don't know how to make one the following links should help a lot, especially the first one. The second one is a webpage tutorial on color theory.

http://www.ficml.org/jemimap/style/color/wheel.html
http://www.colormatters.com/colortheory.html

Comes down to how it's calculated.
2+2 doesn't always equal 4

Never forget: 2 + 2 = 5 for extremely large values of 2.

Right, but here it's not one big single number. It's three pairs of 0-255. So you'd have to half each of the pairs.

Ok ok, this is getting complicated guys, especially when statements being made such as then you really got me lost in the forest of obliviousness

And please don't try to explain me how 2+2 doesn't always adds up to 4 because you guys are scaring the sh**s out of me talk about getting complicated


Please guys, a simple way to dertermine the opposite color of a hex value?

lmao!!!

Simple way == convert it to three decimal numbers between 0-255.

Subtract each of those numbers from 255, and convert your answer back to three pairs of hex numbers (Red, Green and Blue).

You call that simple

Come on man, you're sh*tting me right?

Nope, you can make up a PHP function to do it real easy.

Use substr() to split it up into 3 separate variables, do the math, then join 'em back up.



There ya go. It could probably be optimized quite a bit, but you don't wanna know how hungover I am right now, heh.

You could make a form to submit the colours to a script, rather than having to edit the file each time.

2.0+2.0=4.0

Yeah, but 8+8 doesn't always = 16. Sometimes 8+8 == 10