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💡 Click on any color value below to copy it to clipboard
Running Number
1,400,475
HEX
#155E9B
RGB
21, 94, 155
HSL
207°,76%,35%
HSV
207°,86%,61%
CMYK
86%,39%,0%,39%
Brightness
31%
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
#155E9B sits at 207° on the color wheel, placing it in the azure family of the cool half of the spectrum. With 76% saturation and 35% lightness, it reads as a richly saturated, shadowed tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 21, 94, 155 produces a 6.76:1 contrast ratio against white, which clears WCAG AA for body text in that pairing.
In RGB space #155E9B is a clear variant of CSS teal — about 48 units away from #008080. 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 #155E9B in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#155e9b";💡 Click any tab to see how to use #155e9b in different programming languages