Gulf Blue

#000557

General Information about Gulf Blue (#000557)

The hex color code #000557, also known as Gulf Blue, is a very dark shade of blue. It is composed of 0% red, 0.2% green, and 34.1% blue. In the RGB color model, this equates to R:0, G:5, B:87. The corresponding CMYK color values are C:1, M:0.942, Y:0, K:0.659. This color is predominantly blue, with extremely low red and green components, resulting in its deep and almost black-like appearance. Due to its darkness, it has a low luminance value, which impacts its usability in various applications, particularly in designs where readability and contrast are important factors. The color is often associated with depth, sophistication, and mystery.

The hex color #000557, also known as Gulf Blue, presents significant accessibility challenges due to its extremely dark nature. Its very low luminance results in poor contrast against lighter backgrounds, making it difficult for individuals with visual impairments to perceive text or graphical elements. Web developers must avoid using this color for text or interactive elements without ensuring a sufficiently bright foreground color to meet WCAG (Web Content Accessibility Guidelines) contrast ratio requirements. A contrast ratio of at least 4.5:1 for normal text and 3:1 for large text is recommended. Using color contrast tools is crucial to assess and adjust color pairings for optimal readability. Alternative color palettes with higher contrast should be considered to enhance the overall user experience, particularly for users with low vision or color blindness. Careful consideration of accessibility best practices is essential when incorporating such a dark hue into any design.

Shades

Digital Color Formats

RGB
0 5 87
RGB0 5 87
Red
Green
Blue
HSL
236.55 100% 17.06%
236.5510017.06HSL
Hue
Saturation
Lightness
HWB
236.55 0% 65.88%
236.55065.88HWB
Hue
Whiteness
Blackness
hex#000557
rgb0 5 87
hsl236.55 100% 17.06%
cmyk100% 94.25% 0% 65.88%
hwb236.55 0% 65.88%
xyz1.77 0.8 9.08
CMYK
100% 94.25% 0% 65.88%
10094.25065.88CMYK
Cyan
Magenta
Yellow
Key
XYZ
1.77 0.8 9.08
1.770.89.08XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

Buttons

HexColo.rs © 2025