What Kind of Black Is Shikkoku (Jet Black)? Its Meaning and Color Codes

What makes shikkoku different from ordinary black? The Japanese word describes a deep, lustrous black reminiscent of lacquered surfaces. But there is no single, universally assigned HEX color code for shikkoku on the web. Looking at the word’s meaning and several color samples makes it easier to choose an appropriate shade for a design.

What Shikkoku Means and How It Differs from Black

Shikkoku (漆黒) is pronounced “shik-koku.” The first character refers to urushi, the lacquer used on traditional Japanese lacquerware. The word describes a glossy, thoroughly black appearance or a color that evokes it. It can also emphasize extreme darkness, as in the Japanese expression “shikkoku no yami,” meaning pitch-dark surroundings.

Black is a broad color category. Shikkoku adds an association with depth and sheen. A flat digital fill, however, cannot reproduce the reflections that make lacquer look glossy. The darkness of a color and the reflective qualities of a real surface are separate considerations.

Comparing HEX Color Codes for Shikkoku

HEX is a web color notation that represents the amounts of red, green, and blue using hexadecimal numbers. The following samples illustrate different ways to depict a very deep black.

• Standard black: ■#000000. Its red, green, and blue components are all zero. It is the value of the CSS color keyword black; CSS is the styling language used to control the appearance of web pages. Choose this when you want an uncomplicated, neutral black.
• An almost-black sample with a hint of blue: ■#00000F. This is one value published as a sample of shikkoku. With just a little blue, it still looks very nearly black.
• An almost-black sample with a violet undertone: ■#0A0017. Another color reference uses this value for shikkoku. Its small amounts of red and blue produce an extremely dark blue-violet.

The different values demonstrate why the Japanese name does not identify one mandatory HEX code. For practical web design, choose the shade that works with nearby colors and imagery rather than treating any one color chart as definitive.

Imagine a feature page for Japanese lacquer crafts. You could use ■#0A0017 for a heading section and warm off-white ■#F5F3EF for the text. Their calculated contrast ratio is approximately 18.48:1. For a contact button, use light beige ■#E6D9C4 as its background and ■#0A0017 as its lettering: the text-to-button ratio is about 14.71:1. If the area outside the button is also ■#0A0017, the button background differs from its surroundings by the same 14.71:1 ratio.

How to Adjust Shikkoku for Web Design

If you want to convey lacquer’s sheen, consider the highlights and reflected light in photographs of the actual object instead of making every background darker. A product that is already very dark may lose its outline against a black surface. Light surrounding space can help separate the image from its background.

When placing text on dark colors, check the actual contrast ratio rather than relying on the color name. WCAG (Web Content Accessibility Guidelines) 2.2 Level AA requires at least 4.5:1 for normal-sized text and 3:1 for large text. HueRoll can show the contrast of a selected HEX color against white and black, but it cannot compare arbitrary color pairs or automatically judge AA compliance. The off-white and beige combinations above were calculated separately.