Blue Charcoal

#040C1A

General Information About Blue Charcoal (#040C1A)

#040C1A, also known as Blue Charcoal, is a very dark shade of blue with a subtle, almost black appearance. This color is composed of 1.57% red, 4.71% green, and 10.2% blue. It's often used in design to create a sense of sophistication, mystery, and depth. The color falls into the category of very dark, muted tones, making it ideal for backgrounds, accents, or elements where a subtle yet impactful presence is desired. In the sRGB color space, its numerical representation is (4, 12, 26). Due to its low luminance, it is crucial to consider accessibility when using it in designs. It is important to pair it with lighter colors to ensure readability and contrast.

The hex color #040C1A, also known as Blue Charcoal, presents significant accessibility challenges. Its very low luminance of approximately 0.003 makes it extremely difficult to perceive for individuals with low vision or color blindness. According to WCAG guidelines, this color fails all contrast ratio tests against white (#FFFFFF), resulting in a contrast ratio of only 5.08:1. To ensure accessibility, it is crucial to avoid using #040C1A as text color on light backgrounds. If used, a much lighter color should be used for text. A minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text is recommended. Consider alternative colors with higher luminance or pairing this color with very light shades to meet accessibility standards. Tools like contrast checkers can help assess the contrast ratio and suggest accessible color combinations.

Shades

Digital Color Formats

RGB
4 12 26
RGB4 12 26
Red
Green
Blue
HSL
218.18 73.33% 5.88%
218.1873.335.88HSL
Hue
Saturation
Lightness
HWB
218.18 1.57% 89.8%
218.181.5789.8HWB
Hue
Whiteness
Blackness
hex#040C1A
rgb4 12 26
hsl218.18 73.33% 5.88%
cmyk84.62% 53.85% 0% 89.8%
hwb218.18 1.57% 89.8%
xyz0.37 0.36 1.03
CMYK
84.62% 53.85% 0% 89.8%
84.6253.85089.8CMYK
Cyan
Magenta
Yellow
Key
XYZ
0.37 0.36 1.03
0.370.361.03XYZ
X
Y
Z

Alternative colors

Applications

Complementary color

Buttons

HexColo.rs © 2025