Cerulean Blue

#1B4DBB

General Information about Cerulean Blue

Cerulean Blue, represented by the hexadecimal color code #1B4DBB, is a medium-dark shade of blue that evokes feelings of tranquility and stability. It is a popular choice in various design fields, including web design, graphic arts, and interior decoration. Its hex code breaks down into red (1B), green (4D), and blue (BB), indicating a strong presence of blue with moderate red and green components. This particular shade is often associated with professionalism, reliability, and trustworthiness. Cerulean Blue is versatile and can be used in a variety of contexts, from creating calming backgrounds to highlighting important elements in a design. In branding, it can convey a sense of dependability and competence, making it suitable for businesses in the financial, healthcare, and technology sectors.

The hex color #1B4DBB, a shade of Cerulean Blue, presents some accessibility challenges in web design. Its relatively low luminance can lead to insufficient contrast when paired with lighter text or background colors. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for normal text and 3:1 for large text. When using #1B4DBB, it's crucial to test the color contrast against its paired elements to ensure readability for users with visual impairments. Tools like WebAIM's Contrast Checker can be invaluable in this process. Consider using lighter shades of yellow or white for text on a #1B4DBB background, or darker shades for backgrounds with #1B4DBB text. Also, provide alternative visual cues for interactive elements, such as underlines or icons, to further improve accessibility.

Shades

Digital Color Formats

RGB
27 77 187
RGB27 77 187
Red
Green
Blue
HSL
221.25deg 74.77% 41.96%
221.2574.7741.96HSL
Hue
Saturation
Lightness
HWB
221.25deg 10.59% 26.67%
221.2510.5926.67HWB
Hue
Whiteness
Blackness
hex#1B4DBB
rgb27 77 187
hsl221.25deg 74.77% 41.96%
cmyk85.56% 58.82% 0% 26.67%
hwb221.25deg 10.59% 26.67%
xyz-d650.12 0.09 0.48
oklch0.4597 0.1817 262.92
oklab0.4597 -0.02 -0.18
CMYK
85.56% 58.82% 0% 26.67%
85.5658.82026.67CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.12 0.09 0.48
0.120.090.48XYZ
X
Y
Z
OKLCH
0.4597 0.1817 262.92
0.45970.1817262.92LCH
Lightness
Chroma
Hue
OKLAB
0.4597 -0.02 -0.18
0.4597-0.02-0.18LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

Buttons