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Welcoming Indicolite

#66e3da
Notes

Welcoming Indicolite (#66E3DA) 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 (176°, 69%, 65%) places it in the balanced 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 red. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#66e3da
RGB
rgb(102, 227, 218)
HSL
hsl(176, 69%, 65%)
HWB
hwb(176 40% 11%)
OKLCH
oklch(84.3% 0.112 188.8)
P3
color(display-p3 0.5328 0.8793 0.8523)
HSV
hsv(176, 55%, 89%)
LAB
lab(83.35% -36.81 -6.15)
LCH
lch(83.35% 37.32 189.49)
CMYK
cmyk(55%, 0%, 4%, 11%)

Etymology

Welcoming
adjective

Old English wel-cuman, well-coming — present-participle of welcome. As a color modifier, welcoming implies a clear-and-inviting-and-warm quality where the hue carries the visual register of cordial-and-hospitable color-tone. Sits at the crisp-and-cheerful end of the grid, parallel to hospitable and inviting in usage.

Indicolite
noun

A blue variety of tourmaline — colored by trace iron, mined principally in Brazil, Mozambique, and Pakistan. The color refers to a faceted Brazilian indicolite: a saturated, slightly cool deep blue-green with the gem's signature internal warmth. Cooler than aquamarine.

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 explore

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.

#66e3da
Original
#d8d8da
Protanopia
#c4c9db
Deuteranopia
#00e8e0
Tritanopia
#c8c8c8
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
1.55:1
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
13.56:1

Wide gamut

Display P3 representation

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.

sRGB hex
sRGB hex
##66E3DA
Display P3
Display P3
color(display-p3 0.5328 0.8793 0.8523)
P3 has subtle headroomOKLCH chroma 0.112

Moderately saturated colors gain a small bump in P3 — the difference is usually visible side-by-side on wide-gamut hardware but won't change the character of the color.

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