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Running Number
4,220,554
HEX
#40668A
RGB
64, 102, 138
HSL
209°,37%,40%
HSV
209°,54%,54%
CMYK
54%,26%,0%,46%
Brightness
37%
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
#40668A sits at 209° on the color wheel, placing it in the azure family of the cool half of the spectrum. With 37% saturation and 40% lightness, it reads as a softly muted, shadowed tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 64, 102, 138 produces a 6.02:1 contrast ratio against white, which clears WCAG AA for body text in that pairing.
In RGB space #40668A is a clear variant of CSS steel blue — about 51 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 #40668A in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#40668a";💡 Click any tab to see how to use #40668a in different programming languages