Cerulean Blue

#1F51BE

General Information

Cerulean Blue, with the hexadecimal code #1F51BE, is a captivating shade of blue that lies between cyan and azure on the color spectrum. It is characterized by its moderate saturation and medium brightness, giving it a calming yet vibrant appearance. This color is often associated with the sky and sea, evoking feelings of tranquility, stability, and inspiration. In color psychology, blue is known to represent trust, loyalty, and wisdom, making Cerulean Blue a popular choice for brands and designs aiming to convey these qualities. The color's unique blend of lightness and depth also allows for versatile applications, ranging from web design to fashion and interior decoration. Cerulean blue can also be mixed in paints by combining blue and a touch of green.

The color #1F51BE, also known as Cerulean Blue, presents some accessibility challenges, particularly concerning color contrast. When used as a background color, it's crucial to pair it with text that has sufficient contrast to ensure readability for individuals with visual impairments. According to WCAG guidelines, the contrast ratio between text and background should be at least 4.5:1 for normal text and 3:1 for large text. Given the darkness of Cerulean Blue, lighter text colors such as white (#FFFFFF) or very light shades of yellow or green would be more appropriate choices to meet these standards. Tools like WebAIM's contrast checker can be used to assess the contrast ratio and ensure compliance. Using this color for critical interface elements, such as buttons or links, also requires careful consideration of focus states and visual cues to ensure they are easily distinguishable. Proper use of ARIA attributes can further enhance the accessibility of elements using this color.

Shades

Digital Color Formats

RGB
31 81 190
RGB31 81 190
Red
Green
Blue
HSL
221.13deg 71.95% 43.33%
221.1371.9543.33HSL
Hue
Saturation
Lightness
HWB
221.13deg 12.16% 25.49%
221.1312.1625.49HWB
Hue
Whiteness
Blackness
hex#1F51BE
rgb31 81 190
hsl221.13deg 71.95% 43.33%
cmyk83.68% 57.37% 0% 25.49%
hwb221.13deg 12.16% 25.49%
xyz-d650.13 0.1 0.5
oklch0.4714 0.1799 262.89
oklab0.4714 -0.02 -0.18
CMYK
83.68% 57.37% 0% 25.49%
83.6857.37025.49CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.13 0.1 0.5
0.130.10.5XYZ
X
Y
Z
OKLCH
0.4714 0.1799 262.89
0.47140.1799262.89LCH
Lightness
Chroma
Hue
OKLAB
0.4714 -0.02 -0.18
0.4714-0.02-0.18LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons