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💡 Click on any color value below to copy it to clipboard
Running Number
1,215,219
HEX
#128AF3
RGB
18, 138, 243
HSL
208°,90%,51%
HSV
208°,93%,95%
CMYK
93%,43%,0%,5%
Brightness
45%
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
#128AF3 sits at 208° on the color wheel, placing it in the azure family of the cool half of the spectrum. With 90% saturation and 51% lightness, it reads as a fully saturated, balanced tone — an immediate, signal-grade voice that demands attention. Its RGB mix of 18, 138, 243 produces a 5.96:1 contrast ratio against black, which clears WCAG AA for body text in that pairing.
In RGB space #128AF3 is a distant relative of CSS royal blue — about 60 units away from #4169E1. Designers reach for azure 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 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 #128AF3 in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#128af3";💡 Click any tab to see how to use #128af3 in different programming languages