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Dense Aries Ruby

#ac1929
Notes

Dense Aries Ruby (#AC1929) is a true red with a warm character. It leans warm, pulling light toward red, orange, and yellow. Naturally inviting, it suits editorial and hospitality contexts. Its HSL profile (353°, 75%, 39%) 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 teal. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#ac1929
RGB
rgb(172, 25, 41)
HSL
hsl(353, 75%, 39%)
HWB
hwb(353 10% 33%)
OKLCH
oklch(48.0% 0.179 22.8)
P3
color(display-p3 0.6189 0.1645 0.1826)
HSV
hsv(353, 85%, 67%)
LAB
lab(37.17% 56.70 31.12)
LCH
lch(37.17% 64.68 28.77)
CMYK
cmyk(0%, 85%, 76%, 33%)

Etymology

Dense
adjective

Latin dēnsus, thick / crowded — sharing root with English condense. As a color modifier, dense implies a saturated-and-tightly-packed quality where the hue carries maximum pigmentation per visual unit-of-area. Sits at the bold-and-saturated end of the grid, parallel to thick and concentrated in usage.

Aries
modifier

Latin aries, ram-of-the-fleece. As a color modifier, aries implies a ram-and-fire-sign-and-Mars-ruled-cardinal-fire quality, the visual register of Babylonian-ram-and-Greek-Aries hand-ram-and-fire-sign-and-Mars-ruled-cardinal-fire Babylonian-ram-and-Greek-Aries-and-Golden-Fleece aries-and-ram-and-fire-sign surfaces under Babylonian-ram-and-Greek-Aries-and-Golden-Fleece spring-equinox-and-March-and-April fire-sign-light. Sits at the modifier-and-zodiac end of the grid, parallel to taurus and gemini 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.

#ac1929
Original
#4a4428
Protanopia
#6e6223
Deuteranopia
#be0021
Tritanopia
#393939
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
7.18:1
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
2.93:1

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
##AC1929
Display P3
Display P3
color(display-p3 0.6189 0.1645 0.1826)
P3 has subtle headroomOKLCH chroma 0.179

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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