What Colors Go with Deep Indigo? A Color Scheme to Give Deep Blue-Violet a Rich, Weighty Look [#2A1B98]

Deep Indigo (■#2A1B98) is a deep blue-violet that combines the calm character of blue with the depth of purple. On a website, it can work well for university or research-institution project pages, including research titles, section headings, and primary “View Paper” buttons, when you want a weightier presentation than a brighter blue. If blue-violet and navy tones cover too much of the page, however, the interface can become more visually dominant than research summaries or charts, and selected research filters may end up relying on color alone. This example pairs Deep Indigo with warm parchment, graphite navy, and muted brass to give the deep blue-violet a rich, weighty look while keeping research information organized.

Build on warm parchment and use muted brass for a gentle temperature contrast

With ■#2A1B98, one practical combination is warm parchment ■#F5F1E8 for the background, graphite navy ■#343744 for body and supporting text, and muted brass ■#C4B58A as the accent.

■#F5F1E8 is a light color with a slight yellow cast, creating a strong brightness difference from indigo while making information surfaces softer than pure white. ■#343744 is a low-saturation dark neutral with a subtle blue bias, which helps organize research summaries, author names, and update dates without competing with the main color. ■#C4B58A is a muted yellow-toned color that shifts away from blue-violet in hue without becoming vivid, adding a gentle temperature contrast to a cool, weighty palette.

On research-project pages, concentrate Deep Indigo in research titles and primary actions

Use ■#F5F1E8 across research-summary and results-card backgrounds, then reserve ■#2A1B98 for research titles, field headings, and primary “View Paper” or “Read Results” button backgrounds. Put body copy, author information, and update dates in ■#343744 so Deep Indigo remains focused on key information and primary actions. For supporting UI (user-interface elements such as buttons and selection controls), a small ■#C4B58A secondary button or label can sit on a dark ■#2A1B98 surface with ■#343744 text.

A contrast ratio is the numerical difference in relative brightness between foreground and background colors. ■#2A1B98 against ■#F5F1E8 is about 10.90:1, ■#343744 against ■#F5F1E8 is about 10.49:1, and ■#343744 against ■#C4B58A is about 5.81:1. WCAG (Web Content Accessibility Guidelines) 2.2 requires at least 4.5:1 for normal-size text, so the text combinations shown here meet that threshold. The contrast between ■#2A1B98 and ■#C4B58A is about 6.04:1, which also exceeds the 3:1 threshold for visual information needed to identify meaningful UI components against adjacent colors.

Keep the weighty look, but do not communicate research-filter states through color alone

The contrast between ■#C4B58A and ■#F5F1E8 is only about 1.80:1. Do not use muted brass as normal text on the light background, and do not rely on the boundary between those two colors alone to identify a button or card. On light surfaces, combine ■#2A1B98 or ■#343744 borders and text with the control.

States such as a selected research-field filter or a “Published” document should not be distinguished by color alone. Add text, a check mark, or a stronger border so the state remains clear without relying on hue. A weighty layout also does not require filling the whole page with dark blue-violet. Keeping enough ■#F5F1E8 whitespace and information cards, while concentrating indigo in headings and actions, makes the information hierarchy easier to maintain. In HueRoll, you can enter ■#2A1B98 as a HEX color code (a web color notation beginning with #), review related colors and palette suggestions, and compare the selected color with white or black. HueRoll does not compare arbitrary pairs of colors or automatically judge WCAG AA/AAA conformance, so the two-color contrast ratios in this article were calculated separately.