How do I center an image with CSS?

Quora is not Stack Overflow, nor should it become one.  Try looking at http://stackoverflow.com/search?... to see if any of those questions can help. With  that understanding, I'll provide some context that can help you improve your research:Your question can be extrapolated to mean centering for any HTML element-- not just imagesCentering occurs on two axis: vertical and horizontalCSS2.1 does not offer any intuitive method for centering elementsCSS2.1 offers one method for horizontally centering elements, which, as you can guess, is not intuitiveThe Flexbox module, which is commonly consisdered "CSS3",  provides intuitive centering along the horizontal and vertical axisOther folks have given answers which may be considered correct. Keep these things in mind:In CSS 2.1, you can center horizontally, by setting left/right margins to auto  -- this only works if you assign a width to a block level element, but...text can be horizontally centered with  text-align:center without needing to assign a width, and content in a table cell  or inline element, can be vertically centered with vertical-align: middle, But if you don't care about IE9 or older, you can center in both directions with FlexboxAnd all of this related to centering elements relative to their container. If this image is a background image, that is applied to an element, then Matt Schlenker's answer is what you want.

What are some ways I can pratice CSS positioning?

I find that I am best taught CSS principles by giving myself a problem to solve.Vertically and horizontally centering a div within a div is something that has many solutions. It gets interesting when the outer div doesn't have a fixed height - meaning it could be different heights depending on the content or window size.Create a problem for yourself. An example of the above would be creating a picture frame using html and CSS.Without using tables, borders, and box shadows and assuming that the frame is always a

Why can’t I access an image using CSS background properties?

when trying to applying an image in the background of an element, you shoulddefine height and width of element.have background-image : url(‘absolute/relative path of the image’)example:.image{display : blockposition:relative;height:20px;width: 20px;background-image : url(‘path of the image’);}

Adding background color and background image using css? Is it possible, I am trying to get a dark coloured background with a faded image over the top

If what you're looking for is a single element, you can easily accomplish it with these few lines of code..div {
background: #000 url('path/to/image.png');
}
However, if you're looking to accomplish some more like an overlay, you can try this..div {
/* Keeps the overlay inside */
position: relative;
}

.div:before {
content: '';
position: absolute;
top: 0;
left: 0;
display: block;
width: 100%;
height: 100%;

/* Black with an opacity of 80% */
background: rgba(0,0,0,0.8);
}