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Ostentatious Ruggine

#f78b25
Notes

Ostentatious Ruggine (#F78B25) is a true orange with a neon character. It sits at the high-saturation edge of its family. Use it sparingly, as signage, accent, or highlight against darker surfaces. Its HSL profile (29°, 93%, 56%) places it in the highly saturated band at a mid 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 azure. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#f78b25
RGB
rgb(247, 139, 37)
HSL
hsl(29, 93%, 56%)
HWB
hwb(29 15% 3%)
OKLCH
oklch(74.0% 0.167 57.2)
P3
color(display-p3 0.9117 0.5662 0.2514)
HSV
hsv(29, 85%, 97%)
LAB
lab(68.30% 34.62 66.64)
LCH
lch(68.30% 75.10 62.55)
CMYK
cmyk(0%, 44%, 85%, 3%)

Etymology

Ostentatious
adjective

Latin ostentātiōnis, display — adjectival suffix -ous, derived from ostendere (to show). As a color modifier, ostentatious implies a saturated-and-attention-demanding-and-elaborate quality, the bright color of Belle-Époque-and-Gilded-Age showy-luxury-display interior-decoration. Sits at the bright-and-flamboyant end of the grid, parallel to flamboyant and showy in usage.

Ruggine
noun

The Italian word for rust — borrowed into fashion vocabulary for the slightly muted deep orange-brown of weathered iron and autumn foliage. The color refers to a ruggine-dyed Florentine wool: a deep, slightly muted dark orange-brown with the matte finish of plant-and-iron-mordant dye. The Italian cousin of rust.

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.

#f78b25
Original
#ab970b
Protanopia
#c5b024
Deuteranopia
#ff7378
Tritanopia
#9b9b9b
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).
Failon White
2.42:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAAon Black
8.67:1

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
##F78B25
Display P3
Display P3
color(display-p3 0.9117 0.5662 0.2514)
P3 has subtle headroomOKLCH chroma 0.167

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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