Loading...
💡 Click on any color value below to copy it to clipboard
Running Number
2,658,043
HEX
#288EFB
RGB
40, 142, 251
HSL
211°,96%,57%
HSV
211°,84%,98%
CMYK
84%,43%,0%,2%
Brightness
49%
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
#288EFB sits at 211° on the color wheel, placing it in the azure family of the cool half of the spectrum. With 96% saturation and 57% lightness, it reads as a fully saturated, light tone — an immediate, signal-grade voice that demands attention. Its RGB mix of 40, 142, 251 produces a 6.35:1 contrast ratio against black, which clears WCAG AA for body text in that pairing.
In RGB space #288EFB is a clear variant of CSS royal blue — about 52 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 #288EFB in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#288efb";💡 Click any tab to see how to use #288efb in different programming languages