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💡 Click on any color value below to copy it to clipboard
Running Number
10,751,791
HEX
#A40F2F
RGB
164, 15, 47
HSL
347°,83%,35%
HSV
347°,91%,64%
CMYK
0%,91%,71%,36%
Brightness
25%
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
#A40F2F sits at 347° on the color wheel, placing it in the red family of the warm half of the spectrum. With 83% saturation and 35% lightness, it reads as a richly saturated, shadowed tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 164, 15, 47 produces a 7.81:1 contrast ratio against white, which clears WCAG AAA for body text in that pairing.
In RGB space #A40F2F is a clear variant of CSS firebrick — about 27 units away from #B22222. Designers reach for red hues at this saturation when the brief calls for bold, immediate signal, and at this lightness when they want a present, comfortable mid-canvas voice. 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 #A40F2F in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#a40f2f";💡 Click any tab to see how to use #a40f2f in different programming languages