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Running Number
5,868,447
HEX
#598B9F
RGB
89, 139, 159
HSL
197°,28%,49%
HSV
197°,44%,62%
CMYK
44%,13%,0%,38%
Brightness
50%
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
#598B9F sits at 197° on the color wheel, placing it in the azure family of the cool half of the spectrum. With 28% saturation and 49% lightness, it reads as a softly muted, balanced tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 89, 139, 159 produces a 5.62:1 contrast ratio against black, which clears WCAG AA for body text in that pairing.
In RGB space #598B9F is a clear variant of CSS steel blue — about 30 units away from #4682B4. Designers reach for azure hues at this saturation when the brief calls for restraint and atmosphere, 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 #598B9F in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#598b9f";💡 Click any tab to see how to use #598b9f in different programming languages