Chathams Blue

#1B4B80

General Information

Chathams Blue, represented by the hexadecimal color code #1B4B80, is a dark shade of blue that exudes a sense of calmness and sophistication. It is named after the Chatham Islands, a remote archipelago belonging to New Zealand. This color falls within the blue color family and has relatively low saturation and brightness values. In the RGB color model, it consists of 10.6% red, 29.4% green, and 50.2% blue. In the CMYK color model, used for printing, it is composed of 79% cyan, 41% magenta, 0% yellow, and 50% black. Its hex code makes it easy to use in digital design, allowing for consistent application across various platforms.

The color #1B4B80, also known as Chathams Blue, presents some accessibility challenges, particularly concerning color contrast. When used as text against a white background, or vice versa, the contrast ratio may not meet WCAG (Web Content Accessibility Guidelines) standards for Level AA or AAA compliance. This means that users with moderate visual impairments might find it difficult to read text in this color. To improve accessibility, consider using a lighter shade of blue or a much darker color for the background to increase contrast. Tools like online contrast checkers can help evaluate and adjust color pairings to meet accessibility standards, ensuring content is perceivable for a wider audience. Also consider providing alternative text options or visual cues for users who may have difficulty distinguishing colors.

Shades

Digital Color Formats

RGB
27 75 128
RGB27 75 128
Red
Green
Blue
HSL
211.49deg 65.16% 30.39%
211.4965.1630.39HSL
Hue
Saturation
Lightness
HWB
211.49deg 10.59% 49.8%
211.4910.5949.8HWB
Hue
Whiteness
Blackness
hex#1B4B80
rgb27 75 128
hsl211.49deg 65.16% 30.39%
cmyk78.91% 41.41% 0% 49.8%
hwb211.49deg 10.59% 49.8%
xyz-d650.07 0.07 0.21
oklch0.4093 0.1028 253.51
oklab0.4093 -0.03 -0.1
CMYK
78.91% 41.41% 0% 49.8%
78.9141.41049.8CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.07 0.07 0.21
0.070.070.21XYZ
X
Y
Z
OKLCH
0.4093 0.1028 253.51
0.40930.1028253.51LCH
Lightness
Chroma
Hue
OKLAB
0.4093 -0.03 -0.1
0.4093-0.03-0.1LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons