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Running Number
3,094,440
HEX
#2F37A8
RGB
47, 55, 168
HSL
236°,56%,42%
HSV
236°,72%,66%
CMYK
72%,67%,0%,34%
Brightness
26%
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
#2F37A8 sits at 236° on the color wheel, placing it in the blue family of the cool half of the spectrum. With 56% saturation and 42% lightness, it reads as a moderately saturated, shadowed tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 47, 55, 168 produces a 9.41:1 contrast ratio against white, which clears WCAG AAA for body text in that pairing.
In RGB space #2F37A8 is a distant relative of CSS indigo — about 72 units away from #4B0082. Designers reach for blue hues at this saturation when the brief calls for a conversational, mid-energy register, and at this lightness when they want a present, comfortable mid-canvas voice. On screen the cool cast tends to pair best with warm neutrals in the 25°-45° range to add life.
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 #2F37A8 in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#2f37a8";💡 Click any tab to see how to use #2f37a8 in different programming languages