Tenebrous Lunar
Tenebrous Lunar (#3B216B) is a deep indigo 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 (261°, 53%, 27%) 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 lime. For something softer, pull in its analogous neighbors on either side of the wheel.
Etymology
Latin tenebrōsus, full of darkness — derived from tenebrae (the deepening shadows of evening prayer service). As a color modifier, tenebrous implies a literary-poetic register for deep-shadowed darkness, where the hue is overwhelmed by ambient gloom. Sits at the deep-and-cool end of the grid, near Stygian but with painterly-baroque connotations.
Latin luna, moon — adopted into English as the adjective for moon-related phenomena. The lunar color tradition refers to the deep blue-violet of Apollo-program lunar-orbit Earthrise photography (1968–1972) showing the deep blue limb of Earth over the gray Moon surface. Lunar color refers to a Hasselblad Earthrise photo's deep-Earth limb: a saturated, slightly cool deep blue-violet with the optical complexity of Earth-atmosphere Rayleigh scattering against the lunar void.
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.