background preloader

Color Contrast Checker

Color Contrast Checker
You are here: Home > Resources > Color Contrast Checker <p><strong>This tool requires Javascript.</strong></p> Normal Text WCAG AA: Pass WCAG AAA: Pass The five boxing wizards jump quickly. Large Text Explanation Enter a foreground and background color in RGB hexadecimal format (e.g., #FD3 or #F7DA39) or choose a color using the color picker. WCAG 2.0 level AA requires a contrast ratio of 4.5:1 for normal text and 3:1 for large text.

Accessibility - W3C The power of the Web is in its universality. Access by everyone regardless of disability is an essential aspect. Tim Berners-Lee, W3C Director and inventor of the World Wide Web The Web is fundamentally designed to work for all people, whatever their hardware, software, language, location, or ability. Thus the impact of disability is radically changed on the Web because the Web removes barriers to communication and interaction that many people face in the physical world. Accessibility is essential for developers and organizations that want to create high quality websites and web tools, and not exclude people from using their products and services. The mission of the Web Accessibility Initiative (WAI) is to lead the Web to its full potential to be accessible, enabling people with disabilities to participate equally on the Web. See below for: Why: The Case for Web Accessibility The Web must be accessible to provide equal access and equal opportunity to people with diverse abilities.

Contrast Ratio Analyser Colour Contrast The old Accessibility Evaluation and Repair Tools (AERT) suggested algorithm for determining colour contrast now directs here. The AERT algorithm was never a recommendation, and WCAG 2.0's luminosity contrast algorithm is recommended instead. Success Criterion 1.4.3 of WCAG 2.0 requires the visual presentation of text and images of text has a contrast ratio of at least 4.5:1, except for the following: Large Text: Large-scale text and images of large-scale text have a contrast ratio of at least 3:1; Incidental: Text or images of text that are part of an inactive user interface component, that are pure decoration, that are not visible to anyone, or that are part of a picture that contains significant other visual content, have no contrast requirement. Analyse Luminosity Contrast Ratio

Web Content Accessibility Guidelines (WCAG) 2.1 abbreviation shortened form of a word, phrase, or name where the abbreviation has not become part of the language Note This includes initialisms and acronyms where: initialisms are shortened forms of a name or phrase made from the initial letters of words or syllables contained in that name or phrase NoteNot defined in all languages. Some companies have adopted what used to be an initialism as their company name. accessibility supported supported by users' assistive technologies as well as the accessibility features in browsers and other user agents To qualify as an accessibility-supported use of a Web content technology (or feature of a technology), both 1 and 2 must be satisfied for a Web content technology (or feature): The way that the Web content technology is used must be supported by users' assistive technology (AT). When a Web Technology is used in a way that is "accessibility supported," it does not imply that the entire technology or all uses of the technology are supported. audio

Top 25 Awesome Accessibility Testing Tools for Websites Cookies are short reports that are sent and stored on the hard drive of the user's computer through your browser when it connects to a web. Cookies can be used to collect and store user data while connected to provide you the requested services and sometimes tend not to keep. Cookies can be themselves or others. There are several types of cookies: Technical cookies that facilitate user navigation and use of the various options or services offered by the web as identify the session, allow access to certain areas, facilitate orders, purchases, filling out forms, registration, security, facilitating functionalities (videos, social networks, etc..). So when you access our website, in compliance with Article 22 of Law 34/2002 of the Information Society Services, in the analytical cookies treatment, we have requested your consent to their use. However, please note that you can enable or disable cookies by following the instructions of your browser.

Contrast Analyser & Accessibility About the Colour Contrast Analyser This native application (available for both Windows and Mac) allows you to evaluate the color visibility and contrast of foreground/background color combinations. It provides an initial pass/fail assessment against WCAG 2.0 color contrast success criteria. In addition, the Colour Contrast Analyser provides functionality to simulate certain visual conditions such as dichromatic color blindness (protanopia, deuteranopia, tritanopia) and cataracts. Details The Color Contrast Analyser was developed to facilitate the assessment of color combinations against WCAG 2.0: The Colour Contrast Analyser uses the following formula to determine contrast: where R, G and B are defined as: if RsRGB <= 0.03928 then R = RsRGB/12.92 else R = ((RsRGB+0.055)/1.055) ^ 2.4if GsRGB <= 0.03928 then G = GsRGB/12.92 else G = ((GsRGB+0.055)/1.055) ^ 2.4if BsRGB <= 0.03928 then B = BsRGB/12.92 else B = ((BsRGB+0.055)/1.055) ^ 2.4 and RsRGB, GsRGB, and BsRGB are defined as: Versions Windows

Bruk av farger | Universell utforming Publisert: 30. jun 2015, Sist endret: 04. mar 2019 Introduksjon Alle brukere vil ha stor glede av visuell markering i menyen av aktiv side, og dette blir gjerne løst med fargeendring. Videre surfer brukerne stadig mer med mobil og nettbrett, i alle mulige situasjoner og omgivelser. Det resulterer ofte i krevende lysforhold som stiller store krav til fargebruk for at det skal ha effekt for alle brukere. Løsninger som møter kravene i forskriften Fargebruk i tekst Hvis du bruker farge til å formidle funksjonalitet eller viktighet, må du supplere med andre metoder for å sikre at alle brukere skjønner hva du formidler. Eksempel på supplerende markering er fet stil for visuell utheving eller understreking av lenker. Kodeeksempel for korrekt markering av uthevet tekst: Hvordan ikke markere <a href=”eks.html” style=”color: #6e1873;”>lenke i brødtekst</a>. Husk at layout skal defineres i CSS, eksempelet skal bare vise merverdien av supplerende markering. Diagram - The super fast color schemes generator The Myths of Color Contrast Accessibility - UX Movement - Medium There’s a growing demand for designers to make their interfaces accessible to all users. It’s important to accommodate users with disabilities, but there are many myths to color contrast accessibility being perpetuated by misinformed people. They often parrot these myths to discredit a design, without understanding in which situations a color contrast standard applies. Not only that, but they assume an interface is inaccessible whenever color contrast is used to convey information. Because of this, designers often feel the need to obsess over accessibility, and are misled into believing their interface isn’t accessible when it actually is. Myth 1: The WCAG requirements are always optimal The Web Content Accessibility Guidelines (WCAG) is a set of principles used as the standard for determining accessible color contrast. One case where the WCAG standards aren’t applicable is with the brightness contrast of white text. Myth 2: Text must meet the AAA requirement, or it’s inaccessible