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How do I give text or an image a transparent background using CSS?
...
Either use a semi-transparent PNG image or use CSS 3:
background-color: rgba(255, 0, 0, 0.5);
Here's an article from css3.info, Opacity, RGBA and compromise (2007-06-03).
<p style="background-color: rgba(255, 0, 0, 0.5);">
<span>Hello, World!</span>
</p>
...
Alternate table row color using CSS?
...imal form". Basically #ccc gets expanded to #cccccc, which means that each RGB colour has the hexadecimal value cc, or decimal value 204 (i.e. rgb(204, 204, 204)). Read more about it here -> en.wikipedia.org/wiki/Web_colors#Shorthand_hexadecimal_form
– Nick Grealy
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CSS background opacity with rgba not working in IE 8
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Yup. rgba() colour values aren’t supported in IE 8.
– Paul D. Waite
Oct 20 '10 at 8:44
11
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How can I quantify difference between two images?
...osure. For simplicity, I convert them to grayscale even if they are color (RGB) images.
You will need these imports:
import sys
from scipy.misc import imread
from scipy.linalg import norm
from scipy import sum, average
Main function, read two images, convert to grayscale, compare and print resu...
How do I get the color from a hexadecimal color code using .NET?
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I'm assuming that's an ARGB code... Are you referring to System.Drawing.Color or System.Windows.Media.Color? The latter is used in WPF for example. I haven't seen anyone mention it yet, so just in case you were looking for it:
using System.Windows....
Determine font color based on background color
... else
d = 255; // dark colors - white font
return Color.FromArgb(d, d, d);
}
This was tested for many various colorscales (rainbow, grayscale, heat, ice, and many others) and is the only "universal" method I found out.
Edit
Changed the formula of counting a to "perceptive luminance...
Adding a guideline to the editor in Visual Studio
...ltiple columns by listing more than one number after the color specifier:
RGB(230,230,230), 4, 80
Puts a white line at column 4 and column 80. This should be the value of a string value Guides in "Text Editor" key (see bellow).
Be sure to pick a line color that will be visisble on your backgroun...
Named colors in matplotlib
... colors by hue, saturation, value and name.
by_hsv = sorted((tuple(mcolors.rgb_to_hsv(mcolors.to_rgba(color)[:3])), name)
for name, color in colors.items())
sorted_names = [name for hsv, name in by_hsv]
n = len(sorted_names)
ncols = 4
nrows = n // ncols
fig, ax = plt.subplots(figsi...
QLabel: set color of text and background
... I think it could be useful to anybody.
I step into the problem of setting RGBA colors (that is, RGB color with an Alpha value for transparency) for color display labels in my painting application.
As I came across the first answer, I was unable to set an RGBA color. I have also tried things like:
...
How to create a tag with Javascript?
...p; !window.opera)) {
styleNode.styleSheet.cssText = 'span { color: rgb(255, 0, 0); }';
} else {
var styleText = document.createTextNode('span { color: rgb(255, 0, 0); } ');
styleNode.appendChild(styleText);
}
document.getElementsByTagName('head')[0].appendChild(style...