How to Use Color to Differentiate Card Importance: Color Schemes That Give Web UI Clear Visual Hierarchy

When several cards appear together on a website, giving every card the same emphasis can make it hard to know where to begin. But filling each card with a strong color creates competing focal points. A card UI (user interface) is an on-screen component that groups related information or actions. Using a coworking-space website as an example, this article explains how to distinguish a featured card, ordinary plan cards, and supporting information without adding lots of colors.

Emphasize one featured card and keep the others consistent

Decide a card’s prominence from its purpose before selecting its colors. If a coworking space wants to help first-time visitors book a tour, the tour-booking card can become the featured one. Day-pass and monthly-plan cards can remain standard, while facility details take a supporting role. The featured card reflects a design decision by the site operator; it is not necessarily the most important choice for every visitor.

Give the featured card a pale surface, a clear outline, and a filled primary-action button. Keep ordinary cards consistent in their background, headings, and spacing, and avoid introducing another large button in the supporting card. Explain the difference with labels such as “Start with a Tour,” “Plans,” and “Facilities and Access,” rather than relying on color to communicate rank.

The strength of a card can also come from its border weight, the area it occupies, and its controls. A slightly wider featured card at the start of the list, followed by evenly sized standard cards, can establish a hierarchy without another bright hue.

Build a three-level card layout for a coworking space

Use pale gray ■#F8FAFC for the overall page background and dark gray ■#1F2937 for body text, with a contrast ratio of about 14.03:1. HEX is a web color notation using # followed by six hexadecimal digits. A contrast ratio measures the difference in relative brightness between neighboring colors, such as text or a visible border and its background.

• Featured card — “Start with a Tour”: use pale mint ■#F0FDFA for the surface, deep teal ■#134E4A for the heading, and dark gray ■#1F2937 for the text. The heading-to-surface ratio is about 9.09:1 and the body-text ratio about 14.07:1. Give the card a teal ■#0F766E outline, contrasting with the mint surface at about 5.25:1 and the outer page background ■#F8FAFC at about 5.23:1. Use the same teal ■#0F766E for the “Book a Tour” button with white ■#FFFFFF lettering, at about 5.47:1.
• Standard cards — “Day Pass” and “Monthly Plan”: use white ■#FFFFFF backgrounds for both cards with dark-gray ■#1F2937 text, at about 14.68:1. Add gray ■#64748B borders, contrasting with the white card ■#FFFFFF at about 4.76:1. Instead of adding more filled buttons, provide underlined deep-teal ■#115E59 links to the plan details; their text contrast against white is about 7.58:1.
• Supporting card — “Facilities and Access”: use light gray ■#F1F5F9 for the background and dark gray ■#1F2937 for the description, at about 13.40:1. Give its underlined link a deep-teal ■#115E59 color, contrasting with the light gray at about 6.92:1. Rather than turning the whole card into a large interactive control, offer a short summary and a clearly named text link.

The cards serve different purposes, so they do not all need identical “Book Now” buttons. Standard cards should remain comparable in their heading, spacing, and link positions; vary the featured card intentionally. It is the connection between color, size, and purpose—not simply using three different background colors—that makes the hierarchy understandable.

Check subtle card edges, text contrast, and interaction cues

Pale mint ■#F0FDFA against the page background ■#F8FAFC has only about 1.00:1 contrast, while a white ■#FFFFFF card against the same page ■#F8FAFC has about 1.05:1. Those fills alone do little to distinguish the card boundaries. Use the outlined edges and spacing, and check whether a very thin line becomes hard to see on the finished screen.

Under WCAG 2.2 (Web Content Accessibility Guidelines) Level AA, normal-sized text generally needs at least 4.5:1 contrast with its background and qualifying large text at least 3:1. A visible boundary that is necessary to identify a user interface control may also need at least 3:1 against adjacent colors. Not every purely decorative border has that requirement. Do not indicate “recommended” or “selected” solely through color: include explicit text or a selection mark as appropriate.

On mobile screens, make sure the featured card does not take so much space that ordinary plans are difficult to reach. HueRoll can help find related colors, tints, and shades from a HEX code and compare a selected color with white or black. It does not compare arbitrary pairs of colors or automatically determine AA or AAA conformance. All other custom color-pair ratios in this article were calculated separately.