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Handmade Tetsu

#150933
Notes

Handmade Tetsu (#150933) is a deep indigo with a jewel character. It carries the deep, saturated richness of a gemstone. Authoritative and slightly formal, it works well for type and heavy UI elements. Its HSL profile (257°, 70%, 12%) places it in the balanced band at a dark lightness. It works well as a headline, icon, or deep background in an otherwise light layout, pairing cleanly with cream, bone, and warm neutrals. For a confident two-color system, pair it with its complementary lime. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#150933
RGB
rgb(21, 9, 51)
HSL
hsl(257, 70%, 12%)
HWB
hwb(257 4% 80%)
OKLCH
oklch(18.9% 0.078 290.1)
P3
color(display-p3 0.0757 0.0373 0.1913)
HSV
hsv(257, 82%, 20%)
LAB
lab(5.36% 17.63 -24.84)
LCH
lch(5.36% 30.46 305.37)
CMYK
cmyk(59%, 82%, 0%, 80%)

Etymology

Handmade
adjective

English compound hand + past-participle made — sharing root with make. As a color modifier, handmade implies a neutral-and-hand-built-and-craft quality, the neutral color of Mingei-Japanese-and-Shaker-and-Wedgwood hand-built-and-craft-tradition pottery-and-textile-and-furniture surface-finish. Sits at the neutral-and-traditional end of the grid, parallel to handcrafted and artisanal in usage.

Tetsu
noun

Japanese 鉄, iron — adopted into Japanese color terminology as the deep iron-gray of tetsubin cast-iron tea-kettles and tatara-furnace pig-iron. Tetsu color refers to a freshly tetsubin-cast iron tea-kettle exterior in raking light: a dark cool-gray with the matte finish of cast-iron-and-iron-tannin patina on hand-cast Nambu-tekki iron-ware.

Closest matches

The nearest named color in three reference sources, ranked by perceptual distance (ΔE76 in CIELAB). ΔE < 1 is imperceptible to most viewers; ΔE > 10 is clearly different. When two sources point to the same hex they’re merged into one tile; click any to open that color’s page.

Variations

Click any swatch to explore

Harmonies

Accessibility

Color-vision simulation

How this color appears to viewers with the four major color-vision-deficiency types. Computed via the Machado (2009) physiologically-based model. If a tile matches the original, the color reads the same to that viewer.

#150933
Original
#001334
Protanopia
#001132
Deuteranopia
#0b141d
Tritanopia
#0f0f0f
Achromatopsia
WCAG contrast

The color used as foreground text against pure white and pure black, with the contrast ratio and WCAG 2.1 grade. Aim for AA (4.5:1) for body text and AA Large (3:1) for 18 pt+ headlines; AAA (7:1) is the gold standard for long-form reading surfaces.

The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAAon White
18.77:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
Failon Black
1.12:1

Wide gamut

Display P3 representation

The CSS Color 4 wide-gamut form of this color. Both swatches render the same color on every display — the P3 form only diverges from sRGB when a designer pushes channels outside sRGB's reach.

sRGB hex
sRGB hex
##150933
Display P3
Display P3
color(display-p3 0.0757 0.0373 0.1913)
Inside sRGBOKLCH chroma 0.078

This color sits well within the sRGB cube. P3 and sRGB share the gray axis and most desaturated tones, so a P3 display renders this identically to an sRGB display.

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