Harbor Blue color code: #33566E
A dockside blue with a mild teal drift.
Harbor Blue · rgb(51, 86, 110)
Every format for Harbor Blue
- HEX
- #33566E
- RGB
- rgb(51, 86, 110)
- HSL
- hsl(204, 37%, 32%)
- HSV
- 204°, 54%, 43%
- CMYK
- 54%, 22%, 0%, 57%
- Lightness
- 32% · mid-tone
Hue sits at 204°, which makes Harbor Blue a teal-leaning navy, with 37% saturation. In the Slate Navy family it reads as a mid-tone option.
Text contrast on Harbor Blue
Contrast ratios are calculated using the WCAG 2.1 relative luminance formula. Normal body text needs 4.5:1 and large text needs 3:1 to pass AA.
White text on Harbor Blue
The quick brown fox jumps over the lazy dog.
7.79:1 — AAA for normal textBlack text on Harbor Blue
The quick brown fox jumps over the lazy dog.
2.7:1 — below AA, decorative use onlyHarbor Blue text on white
The quick brown fox jumps over the lazy dog.
7.79:1 — AAA for normal textAccessibility notes
- Pair Harbor Blue with white text for the strongest reading experience: that combination gives 7.79:1.
- Used as a text colour on white, it clears the 3:1 bar for large headings.
- Never rely on Harbor Blue alone to communicate state. Add an icon, label or underline so the meaning survives for colour-blind users and in greyscale printing.
- When placing text over a photograph tinted with Harbor Blue, add a solid overlay first. Contrast measured against a flat colour does not hold over varying imagery.
Using Harbor Blue in CSS and HTML
CSS example
:root {
--harbor-blue: #33566E;
}
.panel {
background-color: var(--harbor-blue);
color: #FFFFFF;
border: 1px solid #33566E;
}HTML example
<div style="background-color: #33566E; color: #FFFFFF; padding: 1rem;">
Harbor Blue #33566E
</div>Common uses
- Primary buttons, active navigation states and chart series.
- Slate Navy palettes for brand systems that need a dependable cool anchor.
- Print work where a deep blue is preferred to black, using the CMYK build 54%, 22%, 0%, 57%.
- Data visualisation, as one step in a lightness-based navy scale.
Design recommendations
- Build lighter and darker variants by changing only the lightness in
hsl(204, 37%, 32%). Keeping hue fixed is what makes a scale look intentional. - Give Harbor Blue at least one warm counterweight. A cool palette with no warm accent tends to read as cold rather than calm.
- Saturation is moderate, which makes this shade forgiving across large areas and long reading sessions.
Complementary and matching colors
Each of these is derived from the hue, saturation and lightness of Harbor Blue. Click a swatch to copy it.
Similar navy shades
Continue exploring
FAQs about Harbor Blue
What is the Harbor Blue color code?
The Harbor Blue color code is #33566E in HEX, rgb(51, 86, 110) in RGB and hsl(204, 37%, 32%) in HSL.
What is the RGB value of Harbor Blue?
Harbor Blue is rgb(51, 86, 110), meaning 51 units of red, 86 of green and 110 of blue on the 0 to 255 scale.
What is the CMYK value of Harbor Blue?
In CMYK, Harbor Blue converts to approximately 54%, 22%, 0%, 57%. Printed output will look slightly less saturated than the screen preview because CMYK covers a narrower gamut.
Does white text work on Harbor Blue?
White text on Harbor Blue gives a contrast ratio of 7.79:1, which is AAA for normal text.
Does black text work on Harbor Blue?
Black text on Harbor Blue gives a contrast ratio of 2.7:1, which is below AA, decorative use only.
Which colors go with Harbor Blue?
Its direct complement is #AF7650, and the warm accent #D1A657 works well for calls to action. For a quieter scheme, pair it with the analogous blues listed above.
Is Harbor Blue a light or dark navy?
At 32% lightness, Harbor Blue is classed as a mid-tone navy in this collection.