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Bastioned Dryad Ruby

#9c181e
Notes

Bastioned Dryad Ruby (#9C181E) is a true red 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 (357°, 73%, 35%) places it in the balanced band at a mid lightness. It works across type, buttons, and borders, saturated enough to feel deliberate but balanced enough to not fight the rest of the palette. For a confident two-color system, pair it with its complementary cyan. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#9c181e
RGB
rgb(156, 24, 30)
HSL
hsl(357, 73%, 35%)
HWB
hwb(357 9% 39%)
OKLCH
oklch(44.8% 0.166 25.4)
P3
color(display-p3 0.5611 0.1511 0.1436)
HSV
hsv(357, 85%, 61%)
LAB
lab(33.60% 51.97 32.87)
LCH
lch(33.60% 61.50 32.31)
CMYK
cmyk(0%, 85%, 81%, 39%)

Etymology

Bastioned
adjective

Italian bastionato, fortified-with-bastions — past-participle of bastion, derived from bastia (fortified-tower). As a color modifier, bastioned implies a saturated-and-fortified-and-projecting quality, the deep-rich color of Vauban-period military-fortress star-fort projecting-bastion stone-architecture. Sits at the bold-and-fortified end of the grid, parallel to fortified and buttressed.

Dryad
modifier

Greek δρυάς, oak-tree-nymph. As a color modifier, dryad implies an oak-tree-nymph-and-grove-spirit quality, the visual register of Hellenic-dryad-and-oak-grove-nymph hand-oak-tree-nymph-and-grove-spirit Hellenic-dryad-and-oak-grove-nymph-and-Arcadian-grove dryad-and-oak-tree-nymph-and-grove-spirit surfaces under Hellenic-dryad-and-oak-grove-nymph-and-Arcadian-grove Dodona-oak-and-sacred-grove tree-nymph-light. Sits at the modifier-and-myth end of the grid, parallel to nymph and nereid in usage.

Ruby
noun

From the Latin ruber — simply, red. The gemstone is a chromium-tinged corundum, harder than anything in nature except diamond, and so saturated that a fine Burmese pigeon's blood ruby at auction outpaces a comparable diamond by weight. The color borrows the gem's confidence: a clear, glassy red without the brown of garnet or the blue of crimson.

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.

#9c181e
Original
#443d1c
Protanopia
#645918
Deuteranopia
#ac001c
Tritanopia
#343434
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
8.19:1
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
2.56:1

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
##9C181E
Display P3
Display P3
color(display-p3 0.5611 0.1511 0.1436)
P3 has subtle headroomOKLCH chroma 0.166

Moderately saturated colors gain a small bump in P3 — the difference is usually visible side-by-side on wide-gamut hardware but won't change the character of the color.

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