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💡 Click on any color value below to copy it to clipboard
Running Number
4,131,595
HEX
#3F0B0B
RGB
63, 11, 11
HSL
0°,70%,15%
HSV
0°,83%,25%
CMYK
0%,83%,83%,75%
Brightness
10%
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
#3F0B0B sits at 0° on the color wheel, placing it in the red family of the warm half of the spectrum. With 70% saturation and 15% lightness, it reads as a richly saturated, deep tone — a weighted, dramatic presence with deep undertones. Its RGB mix of 63, 11, 11 produces a 16.61:1 contrast ratio against white, which clears WCAG AAA for body text in that pairing.
In RGB space #3F0B0B is a distant relative of CSS black — about 65 units away from #000000. Designers reach for red hues at this saturation when the brief calls for a conversational, mid-energy register, 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 #3F0B0B in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#3f0b0b";💡 Click any tab to see how to use #3f0b0b in different programming languages