Neon Gust Lime
Neon Gust Lime (#66A504) is a deep lime with a jewel character. It carries the deep, saturated richness of a gemstone. Authoritative and slightly formal, it works well for type and heavy UI elements. Its HSL profile (83°, 95%, 33%) places it in the highly saturated band at a dark 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 indigo. For something softer, pull in its analogous neighbors on either side of the wheel.
Etymology
Greek néon, new — element-name (atomic-number 10), discovered by William Ramsay in 1898. As a color modifier, neon implies a saturated-and-electric-glow quality, the bright color of Las-Vegas-and-Times-Square neon-marquee gas-discharge-tube emission. Sits at the bright-and-electric end of the grid, parallel to electric and fluorescent in usage.
Old Norse gustr, sudden-burst-of-wind. As a color modifier, gust implies a sudden-burst-and-cliff-top-and-driven quality, the visual register of Cornish-cliff-and-Hebridean-gust hand-sudden-burst-and-cliff-top-and-driven Cornish-cliff-and-Hebridean-gust-and-North-Atlantic-front gust-and-sudden-burst-and-cliff-top surfaces under Cornish-cliff-and-Hebridean-gust-and-North-Atlantic-front Lizard-Point-and-Outer-Hebrides-and-Faroe-passage cliff-top-wind-light. Sits at the modifier-and-weather end of the grid, parallel to zephyr and mistral in usage.
Citrus aurantiifolia and its key-lime cousin — small, intensely sour green citrus carried by Arab traders from Southeast Asia to the Mediterranean by the eleventh century, then to the Caribbean with Columbus. The color refers to the skin of a fully ripe Persian lime: a saturated, slightly yellow-shifted green with the matte finish of citrus rind. Cooler than chartreuse, sharper than sage, with the same chlorophyll the fruit loses if left to ripen to yellow.
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.