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Running Number
3,742,465
HEX
#391B01
RGB
57, 27, 1
HSL
28°,97%,11%
HSV
28°,98%,22%
CMYK
0%,53%,98%,78%
Brightness
13%
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
#391B01 sits at 28° on the color wheel, placing it in the orange family of the warm half of the spectrum. With 97% saturation and 11% lightness, it reads as a fully saturated, deep tone — a weighted, dramatic presence with deep undertones. Its RGB mix of 57, 27, 1 produces a 15.78:1 contrast ratio against white, which clears WCAG AAA for body text in that pairing.
In RGB space #391B01 is a distant relative of CSS black — about 63 units away from #000000. Designers reach for orange 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 warm cast tends to pair best with cool neutrals around 210°-230° to balance temperature.
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 #391B01 in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#391b01";💡 Click any tab to see how to use #391b01 in different programming languages