Klein Blue color code: #002FA7
The famous ultramarine-adjacent blue, extremely saturated and almost vibrating at scale.
Klein Blue · rgb(0, 47, 167)
Every format for Klein Blue
- HEX
- #002FA7
- RGB
- rgb(0, 47, 167)
- HSL
- hsl(223, 100%, 33%)
- HSV
- 223°, 100%, 65%
- CMYK
- 100%, 72%, 0%, 35%
- Lightness
- 33% · mid-tone
Hue sits at 223°, which makes Klein Blue a true blue navy, with 100% saturation. In the Royal Navy family it reads as a mid-tone option.
Text contrast on Klein 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 Klein Blue
The quick brown fox jumps over the lazy dog.
10.69:1 — AAA for normal textBlack text on Klein Blue
The quick brown fox jumps over the lazy dog.
1.96:1 — below AA, decorative use onlyKlein Blue text on white
The quick brown fox jumps over the lazy dog.
10.69:1 — AAA for normal textAccessibility notes
- Pair Klein Blue with white text for the strongest reading experience: that combination gives 10.69:1.
- Used as a text colour on white, it clears the 3:1 bar for large headings.
- Never rely on Klein 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 Klein Blue, add a solid overlay first. Contrast measured against a flat colour does not hold over varying imagery.
Using Klein Blue in CSS and HTML
CSS example
:root {
--klein-blue: #002FA7;
}
.panel {
background-color: var(--klein-blue);
color: #FFFFFF;
border: 1px solid #002FA7;
}HTML example
<div style="background-color: #002FA7; color: #FFFFFF; padding: 1rem;">
Klein Blue #002FA7
</div>Common uses
- Primary buttons, active navigation states and chart series.
- Royal 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 100%, 72%, 0%, 35%.
- 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(223, 100%, 33%). Keeping hue fixed is what makes a scale look intentional. - Give Klein Blue at least one warm counterweight. A cool palette with no warm accent tends to read as cold rather than calm.
- Saturation is high here, so use it in measured amounts. Large flat areas of a saturated navy can feel heavy on screen.
Complementary and matching colors
Each of these is derived from the hue, saturation and lightness of Klein Blue. Click a swatch to copy it.
Similar navy shades
Continue exploring
FAQs about Klein Blue
What is the Klein Blue color code?
The Klein Blue color code is #002FA7 in HEX, rgb(0, 47, 167) in RGB and hsl(223, 100%, 33%) in HSL.
What is the RGB value of Klein Blue?
Klein Blue is rgb(0, 47, 167), meaning 0 units of red, 47 of green and 167 of blue on the 0 to 255 scale.
What is the CMYK value of Klein Blue?
In CMYK, Klein Blue converts to approximately 100%, 72%, 0%, 35%. Printed output will look slightly less saturated than the screen preview because CMYK covers a narrower gamut.
Does white text work on Klein Blue?
White text on Klein Blue gives a contrast ratio of 10.69:1, which is AAA for normal text.
Does black text work on Klein Blue?
Black text on Klein Blue gives a contrast ratio of 1.96:1, which is below AA, decorative use only.
Which colors go with Klein Blue?
Its direct complement is #FFB805, and the warm accent #E4DF44 works well for calls to action. For a quieter scheme, pair it with the analogous blues listed above.
Is Klein Blue a light or dark navy?
At 33% lightness, Klein Blue is classed as a mid-tone navy in this collection.