HEX Color Code #213B6E

From card backgrounds to icon fills, the dark blue tone #213B6E handles a wide variety of design contexts reliably. This reference page provides its complete color data and professional application ideas.

What Color Is #213B6E?

In the HSL model, #213B6E is defined as (220°, 54%, 28%). The 220° hue angle corresponds directly to the blue portion of the color wheel. Combined with dark lightness and strong saturation, this shade delivers vibrant visual impact.

Color Meaning of #213B6E

From a psychological standpoint, #213B6E taps into blue associations of serenity, intelligence, and authority. The dark character of this specific shade means it asserts presence without overwhelming, making it effective for primary UI elements and brand identifiers.

Where to Use HEX Code #213B6E

E-commerce product card borders and "add to cart" button styling for blue-branded storefronts

Modal overlay tints — applying #213B6E at 10-20% opacity creates depth behind dialog content

Infographic accent elements where multiple blue shades build visual storytelling layers

Notification badges that remain legible against varied nav-bar backgrounds

Event and calendar UI — dark blue marks selected dates and active time slots

Slide deck title bars and presentation themes for consistent conference branding

Similar HEX Color Codes

#302C7D

#3A5487

#445E91

Complementary blue tone for palette coordination

#000E41

Nearby color value offering slightly different brightness

#000437

#007C2D

Adjacent shade useful for gradient transitions

#000023

Comparable blue alternative with distinct character

HEX Code #213B6E in Design Systems

For Figma and code handoff, document #213B6E with its roles: when to use it, which backgrounds it pairs with, and which text colors sit on top of it. Include a "do / don't" section showing approved and forbidden combinations — this prevents designers from accidentally creating inaccessible pairs.

With brightness at 57/255, this shade anchors well as a dark accent. Pair with white (#FFFFFF) for maximum contrast or off-white (#F9FAFB) for a softer feel. Avoid medium grays on top, which create insufficient contrast.

FAQ About HEX Color Code #213B6E

What color is #213B6E?

This HEX code renders as a dark blue shade on screen. Its RGB components (33, 59, 110) create a blue-dominant appearance with dark depth.

Is #213B6E a dark or light color?

Dark. The weighted luminance formula (0.299R + 0.587G + 0.114B) gives #213B6E a score of 57/255, placing it below the midpoint. This classification affects which text colors achieve adequate contrast.

What colors go well with #213B6E?

#213B6E pairs well with contrasting colors opposite it on the color wheel (≈40°) for dynamic compositions. For cohesive, calm palettes, combine it with neighboring hues at ±30° and tinted neutrals in the same blue family.

Can I use #213B6E for branding?

Yes. #213B6E works as a brand color when blue-family associations — trust, reliability, and professionalism — align with your positioning. Define it formally in your brand guidelines with permitted tints, shades, and pairing rules for consistent application.

How do I convert #213B6E to other color formats?

The full conversion: RGB(33, 59, 110), HSL(220°, 54%, 28%). CMYK values depend on the print profile but approximate C:87% M:77% Y:57% K:0%. Our converter tools handle all formats instantly.