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Effulgent Diana Turquoise

#31e3e7
Notes

Effulgent Diana Turquoise (#31E3E7) is a true cyan with a vibrant character. It holds its own as a focal accent, carrying visual weight without tipping into neon territory. Its HSL profile (181°, 79%, 55%) 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.

HEX
#31e3e7
RGB
rgb(49, 227, 231)
HSL
hsl(181, 79%, 55%)
HWB
hwb(181 19% 9%)
OKLCH
oklch(83.4% 0.134 197.3)
HSV
hsv(181, 79%, 91%)
LAB
lab(82.57% -40.58 -14.32)
LCH
lch(82.57% 43.03 199.44)
CMYK
cmyk(79%, 2%, 0%, 9%)

Etymology

Effulgent
adjective

Latin effulgēns, shining-out — present-participle of effulgere, sharing root with fulgor (lightning). As a color modifier, effulgent implies a saturated-and-radiating-light-out quality, the bright color of Renaissance-Madonna halo-and-aureole gold-leaf-and-pigment emission. Sits at the bright-and-saturated end of the grid, parallel to resplendent and radiant in usage.

Diana
modifier

Latin Diana, Roman-goddess-of-moon-and-hunt. As a color modifier, diana implies a Roman-goddess-and-moon-and-hunter-and-virgin quality, the visual register of Roman-Diana-and-Ephesian-Artemis hand-Roman-goddess-and-moon-and-hunter-and-virgin Roman-Diana-and-Ephesian-Artemis-and-Lake-Nemi diana-and-Roman-goddess-and-moon-and-hunter surfaces under Roman-Diana-and-Ephesian-Artemis-and-Lake-Nemi Aventine-Hill-and-Nemi-grove moonlit-grove-light. Sits at the modifier-and-myth end of the grid, parallel to luna and hera in usage.

Turquoise
noun

The hydrated copper-aluminum phosphate mined in Persia and the American Southwest for thousands of years — the firuze of Iran, the chalchihuitl of Mesoamerica, the heart of Pueblo and Navajo silverwork. The color refers to a fine Sleeping Beauty turquoise from Arizona: a saturated, slightly green-shifted blue with the slight matrix of host-rock veining. Brighter than persian, lighter than cerulean.

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

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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.

#31e3e7
Original
#d3d8e8
Protanopia
#bac6e8
Deuteranopia
#00ebe4
Tritanopia
#bdbdbd
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).
Failon White
1.58:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAAon Black
13.27:1

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