HEX Color Code #135B5C

From card backgrounds to icon fills, the dark cyan tone #135B5C handles a wide variety of design contexts reliably. This reference page provides its complete color data and professional application ideas.

What Color Is #135B5C?

In the HSL model, #135B5C is defined as (181°, 66%, 22%). The 181° hue angle corresponds directly to the cyan portion of the color wheel. Combined with dark lightness and strong saturation, this shade delivers vibrant visual impact.

Color Meaning of #135B5C

From a psychological standpoint, #135B5C taps into cyan associations of innovation, technology, and serenity. 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 #135B5C

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

Modal overlay tints — applying #135B5C at 10-20% opacity creates depth behind dialog content

Infographic accent elements where multiple cyan shades build visual storytelling layers

Notification badges that remain legible against varied nav-bar backgrounds

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

Slide deck title bars and presentation themes for consistent conference branding

Similar HEX Color Codes

#224C6B

#004243

#003839

Complementary teal tone for palette coordination

#402E2F

Nearby color value offering slightly different brightness

#4A2493

#541A9D

Adjacent shade useful for gradient transitions

#5E1011

Comparable red alternative with distinct character

HEX Code #135B5C in Design Systems

For Figma and code handoff, document #135B5C 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 70/255, 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 #135B5C

What color is #135B5C?

Visually, #135B5C appears as dark cyan. At HSL(181°, 66%, 22%), the hue sits in the cyan zone with strong saturation and dark brightness.

Is #135B5C a dark or light color?

Based on WCAG luminance weighting, #135B5C scores 70/255 — classifying it as dark. It functions well as button fills, header bars, and accent blocks with light text..

What colors go well with #135B5C?

Try combining #135B5C with shades at 1° (complementary) for bold contrast, 301° and 61° (triadic) for balanced variety, or simply lighter and darker cyan values for monochromatic elegance. Use our color wheel to explore these relationships visually.

Can I use #135B5C for branding?

Yes, #135B5C works effectively for branding. The cyan family communicates refreshment, cleanliness, and precision, and its dark character adds distinctiveness. Pair it with comprehensive brand guidelines specifying approved backgrounds, text treatments, and co-branding rules.

How do I convert #135B5C to other color formats?

#135B5C equals RGB(19, 91, 92) and HSL(181°, 66%, 22%). Each format serves different purposes: HEX for CSS tokens, RGB for JavaScript manipulation, and HSL for intuitive color adjustments. Our conversion tools provide all formats with one click.