If the size will be smaller, the printed image will be fuzzy and blurry. RGB color model stands for Red, Green and Blue is an additive color model in which those three main colors are mixed together to create other colors. RGB color system is suited for surfaces that produce their own light. The screen surface of a computer monitor or a TV set is originally dark, so its original color is black.
All other colors are obtained by using a combination of the three main colors, which in their mixture must create a white color. Experimentally it was proven that red, green and blue are the most suited for human eyes. As we know, the surface of the screen is not solid, it consists of small dots called pixels.
Each pixel consists of three blocks, red, green and blue. By varying the brightness level of each block we can get different colors. The information about the brightness level is encoded using binary code. For example, the most common for modern displays bit True Color system uses three bytes with values from 0 to for each pixel on the screen. Absolutely red color will have a value This means that the amount of red color is full, of the green is 0 and of the blue is also 0.
Absolutely blue color will have a value of 0. With different combinations different colors are formed: bright-violet is RGB color can also be encoded with the help of the hexadecimal system. Here are some standard colors:. This color system is called additive. In other words, we take black color no color and add primary colors to it, mixing them all the way up to white. This way we can encode 16 colors, which is more than enough for human eyes. In a word, alt tag is an abbreviation of what is essentially an alt attribute on an image tag showing a nature or a content of its image.
That is why each image on any successful website has its alt tag that describes what is actually on it. As a result, various screen readers will make the image from your website accessible while reading out this alternative text.
To illustrate the situation, that is an example of a complete HTML image tag:. So, why does one need alt text for their images? As it has already been mentioned, the alt text literally tells what an image depicts as well as describes the main function of this image on the web page.
Generally speaking, you just propose a person to use some services or buy some products that you provide with the help of this button. Thus, its alternative text simply explains what the button is used for. As you can see, there is nothing complicated.
Here is another simple example of using alt text. As you can see from the screenshot below, this blue call-to-action button lets a person get a shown website template right now. What is more, talking about the image buttons, you could also put some extra call to action text to it.
Actually, it is quite popular policy, so I am sure that you have seen such things a plenty of times while surfing through the web space. Below you can see the next example of this function. Keep in mind that every image you want to use for your online project should have its own alternative text. In point of fact, visually impaired and blind visitors of your site will also use alt in order to figure out what an image or a button is for. What else should you know about it? Ok, now you know a lot of information about the pluses of alternative text.
Still, I know what you are thinking about right now: what should you do in case your image does not have a clear purpose? Without a doubt, it is a logical question, so let me tell you a couple of words. First of all, remember that the images that you would like to use simply for the design of your website should be in your CSS and never in your HTML code. Shortly, the empty alt attribute looks like this:. To make things clear it is here to make sure that screen readers will pass over the image that has no purpose.
For today it was all the information about alternative text. To sum everything up, below you can see the list of the main functions of alt text.
Thus, giving your images an alt text is an easy but important thing. In addition, remember that this text may be provided in the alt attribute or in the surrounding context of your image. I hope you will remind all the given points because they are the main rules of a successful alt text creation. Also, you may watch this video from Matt Cutts that was made in order to help you with a nice alternative text creation.
Still want to know more about alt? In this case, I have a lot of useful articles to share with you! Furthermore, I would like you to tell me your own definition of alt! Maybe you have something to add? For this simple reasons, just leave your comment below! To begin with, CMYK cyan, magenta, yellow, key is the abbreviation for the name of the scheme, which combines the primary pigments. Thus, C means cyan aqua , M means magenta pink , Y is for yellow and K stands for the key.
As you may know, these days K color means black in the modern printing world. Still, things have not always gone this way. Historically, there were other colors used for Key: brown and even blue. Honestly speaking, people used the color that was the cheapest ink to get for their needs. That is why today there are a lot of various draw and paint programs that are able to make use of both mentioned color models.
Still, keep in mind that the CMYK model is usually used for the creation of the printed color illustration. On the other hand, the RGB color scheme is mostly used for the computer displays. Without a doubt, there is a difference between color and pigment. What is more, it is a fundamental one! To make things clear, a color depicts the energy that is radiated by a luminous object.
Consequently, a red area that you may see on a cathode ray tube will look red, as it radiates a big amount of light in the red portion of the electromagnetic radiation spectrum that, by the way, means nearly nanometers , and there is much less light radiated at another wavelength.
Talking about the pigments, they are opposed to the colors and represent the energy that is not absorbed by a substance such as paint and ink. As it has already been said, the primary pigments are cyan, magenta and yellow. In addition, from time to time black Key color is also may be a primary pigment.
All in all, black can be easily made if one combines the mentioned below colors in the large and equal amounts. So, keep in mind that if you see magenta pink ink on some pages, it looks so because it literally absorbs a big amount of energy at all the visible wavelengths except in the pink part of the spectrum, where is reflected the biggest part of the energy.
By the way, did you know that the primary colors and the primary pigments are mathematically related to each other? As a result, if one combines any 2 pure radiant primary colors that still are red, green and blue , the will produce radiation, which will have the appearance of 1 of these pure non-black primary colors that are cyan, magenta and yellow.
On the other hand, if you combine any 2 non-black primary pigments, this action will give you a substance that will have the appearance of one of the pure primary colors written above. For these simple reasons, just leave your comment below! When it comes to a digital image resolution or its size, we pay attention to the number of pixels along the height and length of the digital image. In addition, the more pixels the image contains - the larger it can be printed or displayed on the monitor saving a perfect quality.
If you want to print an image of a certain size, you definitely need to pay attention to a DPI. Speaking of the size of an image in pixels, you will get a photo with x megapixels. To save you from messing up, we will explain to you another side of this abbreviation. Another meaning of DPI comes as a methodology of statistics data accumulation, approvement, and network packets filtering due to their content. This deep packet inspection can analyze not only various packet headers but also the full amount of content that reaches second and higher OSI models levels.
DPI can easily detect and block viruses, moreover, it filters the info that does not meet any specific criteria. Deep Packet Inspection is often used by providers to take control over traffic, to block some protocols, etc. Using DPI, you can also tailor connection statistics for any user.
It is the fifth version of the most popular and most used mark-up coding language. The basics of all internet websites are built on HTML. It is a book that is shared in digital format. Some of them can have paper copies and be sold in such a way, but an eBook is just the electronic version. When we talk about coding language — yes, it is.
Of course, you will also need lots of practice but learning theory from books is the simplest and fastest way to get along with HTML5.
Lilian is a young but very talented copywriter who does researches on various themes. It seems that she knows everything about TemplateMonster products and loves to do listings that could help users to find something they need. In this introduction to WordPress security you will learn some straightforward tips, and best practices for keeping your site safe. The Pro Git eBook, know in its second edition, covers basics of Git as well as advanced topics such as branching and running distributed Git.
It is available as a PDF file, so you can easily download it and use it as per your convenience. Written by Marcin Treder, UX Design for Start-Ups is a must read for any startup or grown-up company that wishes to keep its startup spirit and conquer the world with stunning UX Design.
The Little Book Of Modern Frontend Tooling is a free, work-in-progress, open-source book that takes you through the application development lifecycle and introduces you to the world of tooling for modern web applications. The modern web design process is a free ebook to help you learn how a well-defined process translates to high-performing websites. Study Web Development is a free eBook on how to become a web developer and successful freelancer. The free and in-depth Mobile Game Design or, How to Start Your Own Mobile Game Company ebook talks about the main mechanics for mobile game development, as well as "hidden game mechanics" you can use to stand out in the marketplace.
Building Web Apps with Go is an ebook from Jeremy Saenz that will teach you how to quickly build web applications with the Go programming language. Last year the popular ebook Pixel Perfect Precision Handbook was updated and released with over new 40 pages, as well as some updates to existing content. The Book of Speed by Stoyan Stefanov is a free public domain , online, open-source, not yet finished, book about web performance.
A Practical Guide to Designing for the Web aims to teach you the techniques for designing your website using the principles of graphic design. Pay Me… Or Else! It covers tactics and tips that will help you recover your hard earned money and how to avoid similar situations in the future. Introduction to Good Usability by Peter Pixel. This usabilty guide sheds some light on some common interface elements and mistakes people often make with them. This is by no means a complete guide or solid set of rules, but it is definitely a good start.
Font embedding for the web is a great step in making the web look better and become more functional, but what about security and load times? This book was originally written in for print designers whose clients wanted websites. While browser references and modem speeds may reek of , much of the advice about transitioning to the web still holds true. Integrating Accessibility Throughout Design. With the Web, people with disabilities can do more things themselves, without having to rely on others.
This book helps you improve your websites to remove accessibility barriers and avoid adding new barriers. Getting Real: The Book By 37signals. Getting Real is a smaller, faster, better way to build websites. General Services Administration to help web creators to base their decisions on the most current and best available evidence.
Search User Interfaces. This book outlines the human side of the information-seeking process, and focuses on the aspects of this process that can best be supported by the user interface. It describes the methods behind user interface design generally, and search interface design in particular.
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