Chathams Blue

#1B4D80

General Information about #1B4D80

The hex color #1B4D80, also known as Chathams Blue, is a deep, muted shade of blue that evokes feelings of calmness, reliability, and sophistication. In the RGB color model, it is composed of 10.6% red, 30.2% green, and 50.2% blue. Its CMYK values are 0.79, 0.40, 0.00, 0.50, indicating that it is primarily composed of cyan with smaller amounts of magenta. This color is often associated with trust, stability, and intelligence, making it a popular choice for corporate branding and professional designs. Its subtle nature allows it to be used extensively without being overwhelming, providing a versatile background or accent color.

The hex color #1B4D80, also known as Chathams Blue, presents some accessibility considerations for web development. Its relatively dark hue means that it requires careful pairing with text colors to ensure sufficient contrast for readability. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for standard text and 3:1 for large text against its background. Using white or very light shades of yellow or green as text colors on a #1B4D80 background can help meet these requirements. It's crucial to test the color combination with accessibility tools to ensure compliance. This color might not be suitable for conveying critical information through color alone, as users with visual impairments may struggle to differentiate it from similar dark shades. Consider adding text labels or icons for crucial UI elements.

Shades

Digital Color Formats

RGB
27 77 128
RGB27 77 128
Red
Green
Blue
HSL
210.3deg 65.16% 30.39%
210.365.1630.39HSL
Hue
Saturation
Lightness
HWB
210.3deg 10.59% 49.8%
210.310.5949.8HWB
Hue
Whiteness
Blackness
hex#1B4D80
rgb27 77 128
hsl210.3deg 65.16% 30.39%
cmyk78.91% 39.84% 0% 49.8%
hwb210.3deg 10.59% 49.8%
xyz-d650.07 0.07 0.21
oklch0.4142 0.1006 251.98
oklab0.4142 -0.03 -0.1
CMYK
78.91% 39.84% 0% 49.8%
78.9139.84049.8CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.07 0.07 0.21
0.070.070.21XYZ
X
Y
Z
OKLCH
0.4142 0.1006 251.98
0.41420.1006251.98LCH
Lightness
Chroma
Hue
OKLAB
0.4142 -0.03 -0.1
0.4142-0.03-0.1LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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