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Idyllic Cobblestone

#0b180a
Notes

Idyllic Cobblestone (#0B180A) is a deep green with an earthy character. It leans grounded and natural, the kind of color that plays well with wood, clay, linen, and warm neutrals. Its HSL profile (116°, 41%, 7%) 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 violet. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#0b180a
RGB
rgb(11, 24, 10)
HSL
hsl(116, 41%, 7%)
HWB
hwb(116 4% 91%)
OKLCH
oklch(19.2% 0.033 142.6)
P3
color(display-p3 0.0547 0.0928 0.0448)
HSV
hsv(116, 58%, 9%)
LAB
lab(6.74% -7.78 5.85)
LCH
lch(6.74% 9.73 143.07)
CMYK
cmyk(54%, 0%, 58%, 91%)

Etymology

Idyllic
adjective

Greek eidúllion, little-poem — adjectival suffix -ic. As a color modifier, idyllic implies a neutral-and-pastoral-and-perfect-rural quality, the neutral color of Theocritus-and-Virgil-Eclogues idyllic-and-poetic-rural pastoral-mood color treatment. Sits at the neutral-and-traditional end of the grid, parallel to bucolic and pastoral in usage.

Cobblestone
noun

Old English cobel, rounded river-stone — the iconic dark-gray paving stone of medieval-and-early-modern European cities, particularly the Rome and Edinburgh historic-center streets. Cobblestone color refers to a Roma centro storico sampietrini cobblestone pavement-section in raking sun: a dark cool-gray with the matte finish of basalt-and-leucitite volcanic-rock cobblestones polished by centuries of vespa-tire wear.

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.

#0b180a
Original
#191609
Protanopia
#17140b
Deuteranopia
#0a1715
Tritanopia
#141414
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
18.27:1
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
1.15:1

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
##0B180A
Display P3
Display P3
color(display-p3 0.0547 0.0928 0.0448)
Inside sRGBOKLCH chroma 0.033

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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