Chathams Blue

#1C4A7F

General Information about #1C4A7F

The hexadecimal color #1C4A7F, also known as Chathams Blue, is a dark shade of blue. It is composed of 11% red, 29% green, and 49.8% blue. In the RGB color model, this translates to (28, 74, 127). In the CMYK color model, it is composed of 78% cyan, 42% magenta, 0% yellow, and 50% black. This color is often associated with calmness, stability, and trustworthiness. It's a color commonly found in corporate branding and is often used to evoke a sense of professionalism and reliability. The name "Chathams Blue" suggests a connection to the Chatham Islands, possibly reflecting the color of the ocean or sky in that region. This color is considered a cool color, and it can be used in various design contexts to create a sense of serenity or formality.

The color #1C4A7F, a deep, muted blue, presents some accessibility challenges, particularly in text applications. When used as a foreground color, it requires careful consideration of contrast ratios against background colors. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is necessary for normal text and 3:1 for large text to ensure readability for users with moderate visual impairments. Pairing this color with light backgrounds such as whites, light grays, or pale yellows can improve contrast. Avoid using it with darker shades or similar blues, as the contrast will likely be insufficient. Additionally, providing alternative text descriptions for images using this color is crucial for screen reader users. In interactive elements like buttons, ensure sufficient visual cues beyond color alone to indicate state changes or functionality.

Shades

Digital Color Formats

RGB
28 74 127
RGB28 74 127
Red
Green
Blue
HSL
212.12deg 63.87% 30.39%
212.1263.8730.39HSL
Hue
Saturation
Lightness
HWB
212.12deg 10.98% 50.2%
212.1210.9850.2HWB
Hue
Whiteness
Blackness
hex#1C4A7F
rgb28 74 127
hsl212.12deg 63.87% 30.39%
cmyk77.95% 41.73% 0% 50.2%
hwb212.12deg 10.98% 50.2%
xyz-d650.07 0.07 0.21
oklch0.4065 0.1023 254.21
oklab0.4065 -0.03 -0.1
CMYK
77.95% 41.73% 0% 50.2%
77.9541.73050.2CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.07 0.07 0.21
0.070.070.21XYZ
X
Y
Z
OKLCH
0.4065 0.1023 254.21
0.40650.1023254.21LCH
Lightness
Chroma
Hue
OKLAB
0.4065 -0.03 -0.1
0.4065-0.03-0.1LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons