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Praetorian Ares Ruby

#990819
Notes

Praetorian Ares Ruby (#990819) is a deep 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 (353°, 90%, 32%) places it in the highly saturated band at a dark lightness. Best used in small doses, like logos, CTAs, focus rings, or highlight text, where its saturation becomes a feature rather than noise. For a confident two-color system, pair it with its complementary teal. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#990819
RGB
rgb(153, 8, 25)
HSL
hsl(353, 90%, 32%)
HWB
hwb(353 3% 40%)
OKLCH
oklch(43.4% 0.171 24.8)
P3
color(display-p3 0.5492 0.1173 0.1256)
HSV
hsv(353, 95%, 60%)
LAB
lab(31.85% 53.99 33.83)
LCH
lch(31.85% 63.72 32.07)
CMYK
cmyk(0%, 95%, 84%, 40%)

Etymology

Praetorian
adjective

Latin praetōriānus, of the praetor — adjectival suffix, referring to the Roman-Imperial elite guard-cohorts. As a color modifier, praetorian implies a saturated-and-elite-and-imperial-guard quality, the deep-rich color of Roman-Praetorian-Guard elite-imperial-bodyguard scarlet-tunic-and-bronze-armor military-formation. Sits at the bold-and-formal end of the grid, parallel to spartan and imperial.

Ares
modifier

Greek Ἄρης, god-of-war. As a color modifier, ares implies a war-god-and-iron-and-blood quality, the visual register of Olympian-Ares-and-Spartan-temple-Ares hand-war-god-and-iron-and-blood Olympian-Ares-and-Spartan-temple-and-Areopagus ares-and-war-god-and-iron-and-blood surfaces under Olympian-Ares-and-Spartan-temple-and-Areopagus Athenian-Acropolis-and-rocky-outcrop war-god-light. Sits at the modifier-and-myth end of the grid, parallel to zeus and atlas 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.

#990819
Original
#3f3818
Protanopia
#605511
Deuteranopia
#a90012
Tritanopia
#282828
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
8.74:1
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
2.40:1

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
##990819
Display P3
Display P3
color(display-p3 0.5492 0.1173 0.1256)
P3 has subtle headroomOKLCH chroma 0.171

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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