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💡 Click on any color value below to copy it to clipboard
Running Number
15,678,731
HEX
#EF3D0B
RGB
239, 61, 11
HSL
13°,91%,49%
HSV
13°,95%,94%
CMYK
0%,74%,95%,6%
Brightness
43%
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
#EF3D0B sits at 13° on the color wheel, placing it in the red family of the warm half of the spectrum. With 91% saturation and 49% lightness, it reads as a fully saturated, balanced tone — an immediate, signal-grade voice that demands attention. Its RGB mix of 239, 61, 11 produces a 5.34:1 contrast ratio against black, which clears WCAG AA for body text in that pairing.
In RGB space #EF3D0B is a close cousin of CSS orange-red — about 21 units away from #FF4500. 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 #EF3D0B in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#ef3d0b";💡 Click any tab to see how to use #ef3d0b in different programming languages