Cello

#153D5A

General Information about #153D5A (Cello)

The hexadecimal color code #153D5A, commonly referred to as Cello, represents a dark shade of blue in the cyan-blue color family. It is composed of 8.24% red, 23.92% green, and 35.29% blue. In the RGB color model, it is defined by the values (21, 61, 90). The HSL representation is 207 degrees of hue, 62% saturation, and 22% lightness. In the CMYK color model, it consists of 76% cyan, 32% magenta, 0% yellow, and 65% black. This color evokes feelings of calmness, stability, and depth, often associated with trustworthiness and professionalism. Its dark nature lends itself well to applications requiring a sense of sophistication and authority.

The color #153D5A, also known as Cello, presents some accessibility challenges, particularly in text applications. Its relatively low lightness value (approximately 18%) means that it requires careful consideration of contrast ratios. When used as a background color, it necessitates very light text to ensure readability. According to WCAG guidelines, a contrast ratio of at least 4.5:1 is recommended for standard text and 3:1 for large text. Given its darkness, pairing #153D5A with colors like white (#FFFFFF) or very light shades of yellow or green is advisable. Tools like contrast checkers can precisely measure contrast ratios, helping designers make informed decisions. Moreover, avoid using this color for essential interactive elements without adequate visual cues, as users with low vision might struggle to perceive them. The context of use is also crucial; for purely decorative elements, the contrast requirements may be less stringent, but for anything conveying information or functionality, high contrast is essential to comply with accessibility standards.

Shades

Digital Color Formats

RGB
21 61 90
RGB21 61 90
Red
Green
Blue
HSL
205.22deg 62.16% 21.76%
205.2262.1621.76HSL
Hue
Saturation
Lightness
HWB
205.22deg 8.24% 64.71%
205.228.2464.71HWB
Hue
Whiteness
Blackness
hex#153D5A
rgb21 61 90
hsl205.22deg 62.16% 21.76%
cmyk76.67% 32.22% 0% 64.71%
hwb205.22deg 8.24% 64.71%
xyz-d650.04 0.04 0.1
oklch0.3469 0.0675 243.66
oklab0.3469 -0.03 -0.06
CMYK
76.67% 32.22% 0% 64.71%
76.6732.22064.71CMYK
Cyan
Magenta
Yellow
Key
XYZ-d65
0.04 0.04 0.1
0.040.040.1XYZ
X
Y
Z
OKLCH
0.3469 0.0675 243.66
0.34690.0675243.66LCH
Lightness
Chroma
Hue
OKLAB
0.3469 -0.03 -0.06
0.3469-0.03-0.06LAB
Lightness
Green-Red
Blue-Yellow

Alternative colors

Applications

Complementary color

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