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💡 Click on any color value below to copy it to clipboard
Running Number
265,041
HEX
#040B51
RGB
4, 11, 81
HSL
235°,91%,17%
HSV
235°,95%,32%
CMYK
95%,86%,0%,68%
Brightness
7%
Type
Dark
AA Normal Text: ≥ 4.5:1
AA Large Text: ≥ 3.0:1
AAA Normal Text: ≥ 7.0:1
AAA Large Text: ≥ 4.5:1
#040B51 sits at 235° on the color wheel, placing it in the blue family of the cool half of the spectrum. With 91% saturation and 17% lightness, it reads as a fully saturated, deep tone — a weighted, dramatic presence with deep undertones. Its RGB mix of 4, 11, 81 produces a 17.92:1 contrast ratio against white, which clears WCAG AAA for body text in that pairing.
In RGB space #040B51 is a clear variant of CSS navy — about 48 units away from #000080. Designers reach for blue hues at this saturation when the brief calls for bold, immediate signal, and at this lightness when they want weight, depth, and grounded contrast. On screen the cool cast tends to pair best with warm neutrals in the 25°-45° range to add life.
See how this color appears in real UI elements
Button (filled)
Badge
Progress Bar
Link Hover
Input Focus Ring
Checkbox Active
Toggle Switch On
Slider Thumb
Card Border
Icon Highlight
Tooltip Background
Modal Header
Tab Active
Alert Box
Timeline Dot
Loading Spinner
Dropdown Selected
Table Row Highlight
Calendar Date
Mobile Device
See how to use #040B51 in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#040b51";💡 Click any tab to see how to use #040b51 in different programming languages