Idyllic Flint
Idyllic Flint (#665456) is a true red 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 (353°, 10%, 36%) places it in the muted 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.
Etymology
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.
A microcrystalline form of quartz — flint nodules in chalk beds were knapped into the first stone tools of the Paleolithic, two and a half million years ago. The color refers to a freshly knapped flint flake: a soft, slightly muted dark gray with the conchoidal fracture of silica. Warmer than slate, deeper than pebble, with the prehistoric weight of a material that shaped the entire Stone Age.
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 exploreHarmonies
Accessibility
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.
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.
Wide gamut
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.
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.