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Running Number
4,360,647
HEX
#4289C7
RGB
66, 137, 199
HSL
208°,54%,52%
HSV
208°,67%,78%
CMYK
67%,31%,0%,22%
Brightness
48%
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
#4289C7 sits at 208° on the color wheel, placing it in the azure family of the cool half of the spectrum. With 54% saturation and 52% 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 66, 137, 199 produces a 5.63:1 contrast ratio against black, which clears WCAG AA for body text in that pairing.
In RGB space #4289C7 is a close cousin of CSS steel blue — about 21 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 #4289C7 in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#4289c7";💡 Click any tab to see how to use #4289c7 in different programming languages