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Defined Tooled Lagoon

#37c2dc
Notes

Defined Tooled Lagoon (#37C2DC) 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 (189°, 70%, 54%) 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
#37c2dc
RGB
rgb(55, 194, 220)
HSL
hsl(189, 70%, 54%)
HWB
hwb(189 22% 14%)
OKLCH
oklch(75.3% 0.119 213.3)
P3
color(display-p3 0.3918 0.7502 0.8496)
HSV
hsv(189, 75%, 86%)
LAB
lab(72.60% -27.73 -23.49)
LCH
lch(72.60% 36.34 220.27)
CMYK
cmyk(75%, 12%, 0%, 14%)

Etymology

Defined
adjective

Latin dēfīnīre, to set bounds — past-participle of define. As a color modifier, defined implies a clear-and-edge-distinct-and-precise quality where the hue carries the visual register of sharp-bounded-and-clearly-delimited surface. Sits at the crisp-and-clear end of the grid, parallel to crisp and sharp in usage.

Tooled
modifier

Old French tōl, implement. As a color modifier, tooled implies a hand-worked-and-detailed quality, the visual register of Renaissance-and-Florentine-tooled-leather hand-worked-and-stamped-and-engraved tooled-leather-and-bookbinding-and-saddle-and-belt hand-worked surfaces under Renaissance-and-Florentine hand-tooled-leather workshop-light. Sits at the modifier-and-texture end of the grid, parallel to carved and inlaid in usage.

Lagoon
noun

A shallow body of saltwater partially or fully enclosed by a barrier — coral atoll lagoons in the Pacific, Venice's Laguna Veneta, the Florida Keys' backcountry. The color refers to the average reflectance of a calm tropical lagoon at midday: a saturated, slightly muted blue-green with the optical clarity of shallow water over white sand. Brighter than reef, cooler than aquamarine, with the postcard weight of a Pacific atoll seen from above.

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.

#37c2dc
Original
#afbbde
Protanopia
#98abdc
Deuteranopia
#00ccca
Tritanopia
#a6a6a6
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
2.12:1
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
9.91:1

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
##37C2DC
Display P3
Display P3
color(display-p3 0.3918 0.7502 0.8496)
P3 has subtle headroomOKLCH chroma 0.119

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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