Comments on: Roy.G.Biv alpha http://jasonkarns.com/blog/2009/11/17/roy-g-biv-alpha/ Tales of a Transient Programmer Fri, 03 Sep 2010 01:51:02 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Sermirrarebof http://jasonkarns.com/blog/2009/11/17/roy-g-biv-alpha/comment-page-1/#comment-5291 Sermirrarebof Mon, 23 Aug 2010 21:45:59 +0000 http://jasonkarns.com/blog/?p=47#comment-5291 Hello! Check out a marvelous search engine – <b>Warning</b>: array_merge() [<a href='function.array-merge' rel="nofollow">function.array-merge</a>]: Argument #2 is not an array in <b>/var/www/html/links.php</b> on line <b>16</b> P.S. Yahoo – everything will be found! Google: nothing was really lost… See you! Hello!
Check out
a marvelous search engine –
Warning: array_merge() [function.array-merge]: Argument #2 is not an array in /var/www/html/links.php on line 16
P.S. Yahoo – everything will be found! Google: nothing was really lost…

See you!

]]> By: Oliver Jones http://jasonkarns.com/blog/2009/11/17/roy-g-biv-alpha/comment-page-1/#comment-4272 Oliver Jones Wed, 28 Apr 2010 18:25:07 +0000 http://jasonkarns.com/blog/?p=47#comment-4272 Internet Explorer 8 is very good because it is as stable as Opera. I hate the previous versions of IE like IE6 because it hangs frequently. | Internet Explorer 8 is very good because it is as stable as Opera. I hate the previous versions of IE like IE6 because it hangs frequently. |

]]> By: <img src='http://jasonkarns.com/blog/wp-content/plugins/rpx/images/openid.png' alt='openid'/> jasonkarns http://jasonkarns.com/blog/2009/11/17/roy-g-biv-alpha/comment-page-1/#comment-3786 openid jasonkarns Tue, 16 Feb 2010 04:59:56 +0000 http://jasonkarns.com/blog/?p=47#comment-3786 RGB values in CSS are declared in the range 0-255 for each color (R: 0-255, G: 0-255, B: 0-255). HEX values are the same 0-255 values but converted to hexadecimal (base 16). Rather than 0-9, the digits are 0-F (where F in HEX is equal to 15 in decimal). So 0xFF (prefix 0x denotes a HEX number) is 255 (the highest value that can be represented with 2 HEX digits). So let's say we want black with an opacity of 50%. The standard rgba notation is (0, 0, 0, .5) where the alpha is specified as a decimal percentage. To convert that to HEX, we first need to rescale the percentage (which is on a scale of 0-100) to a scale of 0-255. Multiplying .5 by 255 will give you 127 (rounded down to nearest whole number). Now we just need to convert 127 from decimal to HEX, which can be done with your nearest scientific calculator (or Google). 127 = 0x7F Hope this helps! RGB values in CSS are declared in the range 0-255 for each color (R: 0-255, G: 0-255, B: 0-255). HEX values are the same 0-255 values but converted to hexadecimal (base 16). Rather than 0-9, the digits are 0-F (where F in HEX is equal to 15 in decimal). So 0xFF (prefix 0x denotes a HEX number) is 255 (the highest value that can be represented with 2 HEX digits).

So let’s say we want black with an opacity of 50%. The standard rgba notation is (0, 0, 0, .5) where the alpha is specified as a decimal percentage. To convert that to HEX, we first need to rescale the percentage (which is on a scale of 0-100) to a scale of 0-255. Multiplying .5 by 255 will give you 127 (rounded down to nearest whole number). Now we just need to convert 127 from decimal to HEX, which can be done with your nearest scientific calculator (or Google). 127 = 0×7F

Hope this helps!

]]> By: pen http://jasonkarns.com/blog/2009/11/17/roy-g-biv-alpha/comment-page-1/#comment-3152 pen Wed, 09 Dec 2009 09:19:09 +0000 http://jasonkarns.com/blog/?p=47#comment-3152 great fix - for some reason my rgb just wouldnt work in IE6 - and I didn't want an image instead. Your fix has sorted it, though Im a bit clueless how to calculate other alpha values, I know the color is easily changed. "These values are not your standard HEX values. Instead of 0xRRGGBB, the first 2 digits are the alpha transparency. Converting our 75% into HEX (.75 * 255 –> 191.25 –> 0xBF).." Any guidance on that appreciated. Thanks! great fix – for some reason my rgb just wouldnt work in IE6 – and I didn’t want an image instead. Your fix has sorted it, though Im a bit clueless how to calculate other alpha values, I know the color is easily changed.

“These values are not your standard HEX values. Instead of 0xRRGGBB, the first 2 digits are the alpha transparency. Converting our 75% into HEX (.75 * 255 –> 191.25 –> 0xBF)..”

Any guidance on that appreciated. Thanks!

]]> By: Steve Horn http://jasonkarns.com/blog/2009/11/17/roy-g-biv-alpha/comment-page-1/#comment-3075 Steve Horn Wed, 18 Nov 2009 03:14:16 +0000 http://jasonkarns.com/blog/?p=47#comment-3075 Nice tip! Transparent div over an image thing is something I've had to do a few times. This is a much better approach than what I was using. Nice tip! Transparent div over an image thing is something I’ve had to do a few times. This is a much better approach than what I was using.

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