Aglow Beryl
Aglow Beryl (#17EFE0) is a true cyan 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 (176°, 87%, 51%) 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 red. For something softer, pull in its analogous neighbors on either side of the wheel.
Etymology
Old English on-glōwan, on-glow — sharing root with glow and gleam. As a color modifier, aglow implies a saturated-and-lit-from-within quality, the bright color of fireplace-and-jack-o-lantern interior-glow-lit warm-light emission against ambient darkness. Sits at the bright-and-warm end of the grid, parallel to glowing and aflame in usage.
The mineral Be₃Al₂(SiO₃)₆ — the gem family that includes emerald (chromium-tinted), aquamarine (iron-tinted), and morganite (manganese-tinted). The color beryl refers to the transparent yellow-green variety heliodor or pale common beryl: a soft, slightly muted yellow-green with the high refractive index of a faceted gem. Cleaner than sage, lighter than emerald, with the gem-trade specificity of a single mineral name.
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.