Color contrast is important for reading. Too much color contrast, on the other hand, causes a huge differential in light levels, which impairs the user's eyes when reading. A good balance of contrast between the text and the backdrop color is an excellent technique to make your text eye-safe for the user.
The reason why we need contrast is because our eyes are very sensitive to changes in brightness level. If the text is black on a white background, for example, you will be able to read only up to a certain point before becoming too difficult to see. If the background is dark blue instead, however, you can read into the night without any problems. This is because humans are more sensitive to differences in brightness than to their absolute levels. It is therefore important that the text is not too pale or bright compared to its background.
Generally speaking, there is no right or wrong amount of contrast; it depends on how you as a designer feel about it. But at least 3% should be the average amount of contrast for text to be readable. Anything less than 3% and you'll need to adjust the contrast levels of both text and background to avoid visual fatigue for the reader. More than 3% and you're wasting energy on contrast that isn't needed.
There are two ways to achieve proper contrast: using either foreground/background colors or font styles.
Black text on a white background is simple and traditional, and it has the greatest readability ratio. Blues and grays also give adequate contrast and hence look good against white backgrounds. Reds, oranges, and other bright colors are difficult to read on a white background.
Gray text on a white background is the most common type of text on documents. It is easy to read and understand for most people. The only problem with gray text on a white background is that it can be hard to see sometimes because there is not much difference between black and white. Bright colors on a white background will make them stand out more and help readers to find what they are looking for easier.
Blue text on a white background is the next best thing to black text on a white background. It too has great readability ratings. Red, orange, yellow, green, and purple text on a blue background are all very readable too. The only problem with blue text on a white background is that it can be hard to see sometimes because there is not much difference between black and white.
Green text on a white background is another favorite option for making things easier to read. It has excellent readability ratings too.
The backdrop is black in the high-contrast themes, and the lettering is white. This high-contrast theme is significantly gentler on the eyes and helps to prevent eye strain. This will make your day simpler if you're gazing at a monitor for long periods of time.
A high-contrast environment is one where there are strong contrasts between light and dark colors, or where the text is very small relative to the background. This can be a good thing if you have poor vision or are eyestrain from staring at a screen for long periods of time.
People who work in high-contrast environments need to be aware of this and take precautions to protect their eyesight. First of all, they should use sunglasses to protect their eyes from the bright lights at night and during outdoor activities. They should also try not to gaze at a computer screen for too long without blinking every 20 minutes or so. If you do this, it will help to reduce eye strain and fatigue.
High-contrast environments are common in the printing industry. Designers often use them when they want to draw attention to certain parts of an advertisement or website. This can be useful if you are visually impaired or if you suffer from eye strain.
Print journalists may also work in high-contrast environments. They typically use black ink on white paper for their stories.
Because white has 100% color brightness and black has 0% color brightness, you should avoid using pure black text on a white backdrop. Because there is such a large difference in color brightness, there is a gap in the light levels that consumers observe when reading text.
Because the color characteristics and light are most suitable for the human eye, black text on a white background is preferred. This is due to the fact that white reflects every wavelength in the color spectrum. This is especially true when compared to dark light, which absorbs wavelengths rather than reflecting them. Dark colors on a white background work well too because they don't show up as well on a light colored paper.
Also, black text on a white background is easier to read for people with low vision or color blindness. These individuals have problems distinguishing certain colors, so if you use colors instead, they won't be able to read your document.
At the end of the day, it's about what works best for your audience. If you want to include both black and white text in one document, then by all means do so! It doesn't matter what background you choose as long as it helps those with limited visual capabilities understand your content.
White writing on a black background, sometimes known as "dark mode," requires the eye to work harder and broader in order to absorb more light. Over time this can lead to eyestrain and headaches.
Text on a dark background works best when you have sufficient light to read by. If the text is too dark to be easily read, then it's too dark. You wouldn't drive at night without headlights, so don't read without adequate light.
Black on white looks great on television screens because this combination of colors is visible to the human eye at different wavelengths. When reading on a screen, however, this difference in visibility between black on white and white on black reduces legibility. Because of this, it's best to read text on a white background whenever possible.
When writing emails or other documents that will not be seen in a high-contrast setting (such as a black on white printer), it is acceptable to use black text on a white background. However, if you plan to send these emails or documents to people who will be able to read them easily in low light conditions, it is recommended that they receive some form of notification when your message is from black on white text.
Low vision persons who are not blind see text better whether it is pure black font or white writing on a black backdrop. You may need to utilize black as an accessibility option while designing for them. To avoid eye strain, use dark gray over black for normal-sighted individuals. For those with low vision, however, white on black is more readable.
The high contrast option is a Windows accessibility feature that helps persons with vision impairment. You may modify the text size and color, as well as the backdrop color, for better viewing. Follow the steps below for your Windows version to activate high contrast.