Chathams Blue

#1F4A70

General Information about Chathams Blue

The hexadecimal color code #1F4A70 represents a shade of blue known as Chathams Blue. It is composed of 12.2% red, 29% green, and 43.9% blue. In the RGB color model, this corresponds to the values R:31, G:74, B:112. The CMYK representation is C:72, M:34, Y:0, K:56, meaning it is created from a mix of cyan, magenta, yellow, and black inks. This color is often associated with feelings of calmness, stability, and trust. It is commonly used in corporate branding, web design, and interior decoration to convey professionalism and reliability. Chathams Blue is a relatively dark shade, with a luminance value of approximately 0.13. This means it may require careful consideration when used in combination with other colors to ensure sufficient contrast and readability, particularly in digital interfaces.

The color #1F4A70, also known as Chathams Blue, presents some accessibility considerations, particularly in web design. Its relatively low luminance value of approximately 0.13 may pose challenges when used as a foreground color against a dark background, or conversely as a background color with dark text. According to WCAG (Web Content Accessibility Guidelines) standards, sufficient contrast between text and background is crucial for readability, especially for users with visual impairments. For normal text (smaller than 18pt), a contrast ratio of at least 4.5:1 is recommended, while for large text (18pt and larger), a ratio of 3:1 is considered acceptable. When using #1F4A70, it's essential to pair it with a light foreground color to achieve these contrast ratios. Tools such as contrast checkers can help ensure compliance with accessibility standards, promoting inclusivity and a better user experience for all visitors. Consider using lighter shades of gray, yellow, or white for text or interactive elements placed on a background of #1F4A70 to improve readability and overall accessibility.

Shades

Digital Color Formats

RGB
31 74 112
RGB31 74 112
Red
Green
Blue
HSL
208.15deg 56.64% 28.04%
208.1556.6428.04HSL
Hue
Saturation
Lightness
HWB
208.15deg 12.16% 56.08%
208.1512.1656.08HWB
Hue
Whiteness
Blackness
hex#1F4A70
rgb31 74 112
hsl208.15deg 56.64% 28.04%
cmyk72.32% 33.93% 0% 56.08%
hwb208.15deg 12.16% 56.08%
xyz-d650.06 0.06 0.16
oklch0.3981 0.0802 248.03
oklab0.3981 -0.03 -0.07
CMYK
72.32% 33.93% 0% 56.08%
72.3233.93056.08CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.06 0.06 0.16
0.060.060.16XYZ
X
Y
Z
OKLCH
0.3981 0.0802 248.03
0.39810.0802248.03LCH
Lightness
Chroma
Hue
OKLAB
0.3981 -0.03 -0.07
0.3981-0.03-0.07LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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