What Colors Go with Strong Blue? Color Pairings That Sharply Highlight Deep Blue [#0B3FDA]

Strong Blue (■#0B3FDA) is a vivid blue with substantial depth. On a flight-search and booking website, it can work well for the selected flight, key parts of the fare, and a primary “Book This Flight” button, helping deep blue look sharp even on an information-dense screen. If every search-result card and fare table is heavily emphasized with blue, the color can compete with the differences between flights and with important conditions. A more practical approach is to keep most of the page light and reserve blue for selected states and primary actions. This example pairs it with Ice White, Charcoal Navy, and Warm Amber.

Use Ice White as the base, then add amber to create a temperature contrast with deep blue

One possible combination for ■#0B3FDA is Ice White ■#F5F8FF for the background, Charcoal Navy ■#20283A for body text and supporting information, and Warm Amber ■#F1B85B for secondary labels.

■#F5F8FF is a near-white light color with a slight blue cast, creating a large lightness difference from Strong Blue while keeping result cards and spacing visually light. ■#20283A is a low-saturation dark color with a cool cast, making it suitable for departure times, arrival times, airport names, baggage conditions, and other longer information. ■#F1B85B is a yellow-orange mid-lightness color. Its hue (the basic color family, such as red, blue, or green) is far from blue, so it can create a clear supporting accent on a dark blue surface.

On a flight-search page, concentrate Strong Blue in the selected flight and primary CTA

For a concrete layout, use ■#F5F8FF for the search-results area and unselected flight cards. Use ■#0B3FDA for the selected flight name, part of the main fare display, and the background of the primary CTA (Call to Action, a control that prompts the next step, such as booking or continuing the reservation). Set the text on that button to ■#FFFFFF. The contrast ratio (the relative lightness difference between text or a visual component and its background) is about 7.67:1, which exceeds the 4.5:1 minimum for normal-size text. ■#0B3FDA against ■#F5F8FF is about 7.22:1, so the primary button or selected-flight surface is also clearly distinguishable from the light background.

Use ■#20283A for departure and arrival times, airport names, and fare conditions. If labels such as “Few Seats Left” or “Changes Allowed” appear on a blue card or band, use ■#F1B85B as the label background with ■#20283A text. Warm Amber and Strong Blue have a contrast ratio of about 4.29:1, while Warm Amber and Charcoal Navy are about 8.24:1, helping both the label boundary and the text inside it remain easy to distinguish.

■#20283A against ■#F5F8FF is about 13.85:1, ■#0B3FDA against ■#F5F8FF is about 7.22:1, and ■#F1B85B against ■#20283A is about 8.24:1. WCAG (Web Content Accessibility Guidelines) 2.2 requires at least 4.5:1 for normal-size text. When a color boundary is the visual information needed to identify meaningful UI (user interface elements such as buttons) or states, at least 3:1 against the adjacent color is the relevant minimum.

To keep the look sharp, do not use amber alone as a boundary on a light background

■#F1B85B and ■#F5F8FF have a contrast ratio of only about 1.68:1. On the light background, do not rely on the amber surface alone to show that a button or selection area exists; add a ■#20283A border or text. On a blue surface, the roughly 4.29:1 contrast against ■#0B3FDA provides a clearer separation.

Do not communicate states such as “Selected,” “Few Seats Left,” or “Changes Allowed” with blue and amber alone. Add a text label, icon, check mark, border, or another non-color cue. If the results page includes many blue-toned aircraft photos or banners, leaving more ■#F5F8FF space is generally more useful than spreading ■#0B3FDA across the whole page. In HueRoll, you can enter ■#0B3FDA as a HEX color code (a web color notation beginning with #), then review related colors, color-scheme suggestions, and the selected color’s contrast against white and black. HueRoll does not automatically compare arbitrary pairs of colors or judge AA/AAA conformance, so the two-color contrast ratios in this article were calculated separately.