Color alone should never be used to convey information in a document. Users with visual impairments such as color blindness or color contrast deficiencies may not understand the content being presented, as they may not be able to distinguish between colors. Additionally, documents created with information based on color lose that information when printed on a black and white printer.
Text equivalvents (also known as Alt Text) are added through the Format Picture or Format Object dialog boxes. These are accessed by the "right click" menus when an object is selected. You can also access the Format Picture dialog box from the Picture Tools/Format Size tab when the object is selected.
When a document contains an element that is not native text, it needs to contain a description so non-visual users can understand what is being conveyed. The text description should explain what the element is conveying, not necessarily what it looks like. Some examples on non-text content would be:
Location of the Styles Ribbon
The "Styles Ribbon" is located under the HOME tab
Select the arrow icon located at the bottom right of this section to open the Styles as a sidebar
Keyboard command to open the Styles as a sidebar: While holding down the ALT + H, F, Y
Use the Styles feature to create headings and apply styling to a document. Do not assign headings (or other styles) based on how the font looks in the ribbon or sidebar. The application of the styles is for structure and although some templates for font and style are shown, each style can be modified to meet the look of the document. For example, do not assign your Title a Heading 3 style because in the ribbon/sidebar it is blue, italicized, and a medium font.