Ai-iro (Japanese Indigo)

A greyish blue born from fermented indigo, the wabi-sabi essence of Japanese indigo dyeing

HEX#264348

RGBrgb(38, 67, 72)

HSLhsl(189, 31%, 22%)

HSVhsv(189, 47%, 28%)

CMYKcmyk(47%, 7%, 0%, 72%)

HEXA#264348FF

RGBArgba(38, 67, 72, 1)

HSLAhsla(189, 31%, 22%, 1)

OKLCHoklch(61.8%, 0.037, 207)

LCHlch(56.1%, 18.2, 213)

🎨 Color Palettes

Analogous2-3 adjacent hues (≤60°)

Triadic3 hues spaced 120° apart

Split ComplementaryMain color + colors adjacent to its complement

Complementary2 hues spaced 180° apart

Tetradic (Rectangle)4 hues forming a rectangle

MonochromaticSingle hue with varying saturation and lightness

♿ WCAG Contrast Colors

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Aa14px Body

High Contrast Text

#BCD7DCRatio 7:1AAA

Suitable for body text, headings, and primary content, ensuring readability for all users

Aa14px Body

Standard Text

#97A9C8Ratio 4.5:1AA

Suitable for regular body content, meeting WCAG AA standards

Aa14px Body

Large Text / UI Components

#8980BCRatio 3:1AA Large

Suitable for large text (≥18px bold or ≥24px), icons, UI component boundaries

Aa14px Body

Decorative / Dividers

#9A518FRatio 2:1Fail

Suitable for decorative elements, dividers, non-essential text

📊 Color Scales

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Lightness VariationFixed hue and saturation, proportional lightness scaling 30%→100%

#0C1617

#101C1E

#152528

#192B2F

#1E3539

#213B3F

#274449

Saturation VariationFixed hue and lightness, proportional saturation scaling 40%→100%

#313D3F

#2F3E41

#2D4043

#2C4144

#2A4246

#284348

#274449

Lightness + Saturation Mixed VariationSimultaneous lightness and saturation proportional scaling

#101313

#14191A

#192224

#1D292B

#213336

#233A3E

#274449

Hue Fine-TuningFixed saturation and lightness, stepwise hue fine-tuning ±15°

#274946

#274949

#274749

#274449

#274149

#273E49

#273C49

💡 Use Cases

🧥

Japanese Attire

A classic color for traditional Japanese garments like yukata, samue, and kendo uniforms, understated yet elegant.

🍵

Tea Ceremony

The ideal hue for tea room noren curtains and tea utensil wrapping cloths, complementing matcha green to create wabi-sabi beauty.

🛋️

Japanese Interior

A touch of indigo-dyed wall hanging or cushion by the shōji window infuses modern washitsu rooms with a tranquil Japanese spirit.

📿

Meditation Space

The color of choice for meditation cushions and temple fabric ornaments, guarding inner peace with the serene power of ai-iro.

📜 Origin & History

The history of ai-iro in Japan began in the Nara period, when indigo dyeing techniques were introduced from China via the Korean Peninsula alongside the transmission of Buddhist culture, gradually taking root across various regions and becoming the foundation of Japanese dyeing culture.

During the Heian period, ai-iro became an important color for the aristocracy and the samurai class. Indigo-dyed silk in court attire was regarded as a color of refinement, while samurai favored indigo-dyed cotton for their training garments and daily wear, as ai-iro began to integrate into the spiritual life of the Japanese people.

The Edo period marked the golden age of Japanese indigo dyeing, with large-scale indigo industries forming in places like Awa and Bushū Kawagoe. At that time, nearly everyone in Edo wore indigo-dyed clothing, and ai-iro came to be known as Japan Blue, becoming a visual symbol of Edo commoner culture.

In modern times, ai-iro has continued to flourish within Japanese design aesthetics. From the Mingei movement advocated by Yanagi Sōetsu to the contemporary indigo experiments of Issey Miyake, ai-iro remains the most profound and condensed expression of Japanese craftsmanship and wabi-sabi aesthetics.

🧠 Color Psychology

Wabi-sabiThe deep blue with a slight greyish cast embraces the beauty of imperfection, accepting the traces of time and the transience of all things, revealing genuine purity within simplicity.

TranquilityLike the misty haze lingering in a deep mountain temple, it brings a quiet strength far from the clamor of the world, allowing the heart to return to clarity and peace.

UnderstatementStripping away all ornate decoration, it returns to the purity of material and craft itself, serving as the ultimate embodiment of restrained aesthetic spirit.

FocusThe profound blue tone helps to clear away distracting thoughts and enter a state of total concentration and flow, forming the spiritual backdrop for the artisan at work.

ReverenceA respect for natural materials and the power of time, every strand of blue embodies humility and gratitude towards the workings of heaven and earth.

Zen SpiritThe gradient layers of indigo dyeing, like ink divided into five shades, contain infinite variation within simplicity, guiding one into a meditative state akin to Zen contemplation.

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