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Running Number
5,351,108
HEX
#51A6C4
RGB
81, 166, 196
HSL
196°,49%,54%
HSV
196°,59%,77%
CMYK
59%,15%,0%,23%
Brightness
56%
Type
Light
AA Normal Text: ≥ 4.5:1
AA Large Text: ≥ 3.0:1
AAA Normal Text: ≥ 7.0:1
AAA Large Text: ≥ 4.5:1
#51A6C4 sits at 196° on the color wheel, placing it in the azure family of the cool half of the spectrum. With 49% saturation and 54% lightness, it reads as a moderately saturated, balanced tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 81, 166, 196 produces a 7.60:1 contrast ratio against black, which clears WCAG AAA for body text in that pairing.
In RGB space #51A6C4 is a clear variant of CSS steel blue — about 41 units away from #4682B4. Designers reach for azure 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 #51A6C4 in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#51a6c4";💡 Click any tab to see how to use #51a6c4 in different programming languages