How to Use Different Category Colors in Article Listings Without Creating Too Many Colors

Using different colors for categories such as “Nature Walks,” “Field Notes,” and “Beginner Guides” may help people find articles in a listing. But if every new category introduces another hue, the page can quickly look crowded. This article uses a fictional plant-observation blog to compare two approaches: giving every category the same color, and assigning distinct colors to only a couple of categories. The focus is on the small category labels, not the article card title links.

Use Category Colors to Organize Topics, Without Creating a New Color for Everything

A category label is a short piece of text that identifies an article’s topic. In our fictional blog, “Spring Park Nature Walk Announcement” belongs to “Nature Walks,” “Wildflowers Found Along the River” belongs to “Field Notes,” and “How to Use an Observation Notebook” belongs to “Beginner Guides.” These are invented example articles, not actual blog posts. The words in the labels identify the categories even when the colors cannot be distinguished.

There is no need to give all three categories separate colors from the outset. Start by using one shared category-label style and relying on the text to identify each topic. Consider adding color differences only if the article collection grows and visitors genuinely need another visual cue to locate particular groups.

Keep category colors separate from colors used for states such as “Registration Open” or “Registration Closed.” Even if the “Nature Walks” category uses green, that green does not indicate that an event is currently happening or has places available. If a category name is a link, give it an additional cue such as an underline so people can recognize it as something they can open.

Compare a Single Shared Color with a Limited Category Palette

The examples use HEX color codes, written with a hash sign followed by six hexadecimal characters from 0–9 and A–F. A contrast ratio describes the difference in relative luminance between text and its background. In both approaches, the page remains white ■#FFFFFF, article titles use deep blue-gray ■#263846 at approximately 12.09:1 against white, and summaries use blue-gray ■#41505A at approximately 8.33:1. Only the category-label styling changes.

Option A: Give Every Category Label the Same Colors

Place “Nature Walks,” “Field Notes,” and “Beginner Guides” on the same pale blue-gray ■#EEF2F4 label background with dark blue-gray ■#405463 lettering. The text-to-label contrast ratio is approximately 6.99:1. Because the three categories share this appearance, the labels are easy to recognize as one kind of information without adding more hues to the page.

The pale blue-gray ■#EEF2F4 differs from the white ■#FFFFFF page by only about 1.13:1. If the labels need a more visible outline, use the same gray-green ■#61776F border around each one. That border provides approximately 4.26:1 against the label background ■#EEF2F4. Above all, make sure the category name remains legible even without its border or fill.

Option B: Color Two Categories and Keep the Rest Neutral

• For “Nature Walks,” combine a pale green ■#E8F2EB background with deep green ■#275A43 text. Their contrast ratio is approximately 6.97:1.
• For “Field Notes,” use a pale blue ■#EAF0F9 background with deep blue ■#354F79 text. This pair provides approximately 7.20:1.
• Keep “Beginner Guides” in the shared pale blue-gray ■#EEF2F4 and dark blue-gray ■#405463 combination, maintaining approximately 6.99:1 contrast.

This gives a little more visual distinction to two types that visitors may want to find, without inventing a unique treatment for every future category. Whether that distinction helps will depend on the blog and its readers. Keep every category name visible in text rather than expecting hue alone to communicate its meaning. The pale fills are close to white: pale green ■#E8F2EB against white ■#FFFFFF is approximately 1.15:1, and pale blue ■#EAF0F9 against white ■#FFFFFF is approximately 1.15:1. If additional outlines are needed, reuse the same gray-green ■#61776F border rather than introducing new border colors. Its contrast is approximately 4.19:1 against pale green ■#E8F2EB and 4.19:1 against pale blue ■#EAF0F9.

Keep the Palette Manageable as Categories Grow, Including on Mobile

When a new category is added, put it in the shared neutral style first rather than assigning it a new color immediately. Reuse an existing color only when the categories have a deliberate relationship, or rethink the way the categories are presented if their number becomes difficult to scan. Avoid changing the color assigned to the same category from one listing to another; consistency helps readers recognize the labels.

If the label lettering is faded to very light gray-blue ■#A3B2B8, it has only approximately 1.94:1 contrast against the neutral label background ■#EEF2F4. Do not sacrifice readability simply because the labels are small. On phones, allow long category names enough room instead of truncating the words that identify the topic. Keep labels consistently positioned relative to article titles. Where category names are links, provide an underline or another clear link cue and a visible keyboard-focus indicator. If the interface also has a selected filter, do not convey its selected state by color alone.

Under Level AA of WCAG (Web Content Accessibility Guidelines), normal-sized text generally requires at least 4.5:1 contrast with its background, while large text requires at least 3:1. The category labels here are treated as ordinary small text, and the proposed text-and-background pairs all exceed 4.5:1. These figures were calculated for solid, opaque color pairs; recheck them if opacity, hover, focus, or other interactive states alter the colors in the finished design. Category colors are most useful when they help people choose what to read without turning the article listing into a patchwork of hues.