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Running Number
6,556,445
HEX
#640B1D
RGB
100, 11, 29
HSL
348°,80%,22%
HSV
348°,89%,39%
CMYK
0%,89%,71%,61%
Brightness
16%
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
#640B1D sits at 348° on the color wheel, placing it in the red family of the warm half of the spectrum. With 80% saturation and 22% lightness, it reads as a richly saturated, deep tone — a weighted, dramatic presence with deep undertones. Its RGB mix of 100, 11, 29 produces a 13.06:1 contrast ratio against white, which clears WCAG AAA for body text in that pairing.
In RGB space #640B1D is a clear variant of CSS maroon — about 42 units away from #800000. Designers reach for red 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 #640B1D in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#640b1d";💡 Click any tab to see how to use #640b1d in different programming languages