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Running Number
1,982,784
HEX
#1E4140
RGB
30, 65, 64
HSL
178°,37%,19%
HSV
178°,54%,25%
CMYK
54%,0%,2%,75%
Brightness
21%
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
#1E4140 sits at 178° on the color wheel, placing it in the cyan family of the cool half of the spectrum. With 37% saturation and 19% lightness, it reads as a softly muted, deep tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 30, 65, 64 produces a 11.14:1 contrast ratio against white, which clears WCAG AAA for body text in that pairing.
In RGB space #1E4140 is a distant relative of CSS sea green — about 79 units away from #2E8B57. Designers reach for cyan hues at this saturation when the brief calls for a conversational, mid-energy register, and at this lightness when they want weight, depth, and grounded contrast. 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 #1E4140 in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#1e4140";💡 Click any tab to see how to use #1e4140 in different programming languages