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Serene Carved Lagoon

#45c0df
Notes

Serene Carved Lagoon (#45C0DF) 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 (192°, 71%, 57%) 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
#45c0df
RGB
rgb(69, 192, 223)
HSL
hsl(192, 71%, 57%)
HWB
hwb(192 27% 13%)
OKLCH
oklch(75.3% 0.115 218.0)
P3
color(display-p3 0.4135 0.7429 0.8603)
HSV
hsv(192, 69%, 87%)
LAB
lab(72.42% -24.05 -25.37)
LCH
lch(72.42% 34.96 226.52)
CMYK
cmyk(69%, 14%, 0%, 13%)

Etymology

Serene
adjective

Latin serēnus, clear / unclouded. As a color modifier, serene implies a clear-and-untroubled quality where the hue carries the visual register of cloudless-bright-day atmospheric stability. Sits at the crisp-and-calm end of the grid, parallel to placid and untroubled in usage.

Carved
modifier

Old English ceorfan, to-cut. As a color modifier, carved implies a hand-cut-and-shaped quality, the visual register of Romanesque-and-Gothic-stone-carving hand-cut-and-shaped stone-and-wood-and-ivory hand-carved-and-relief carved-and-shaped surfaces under Romanesque-and-Gothic hand-carved-stone-and-wood workshop-light. Sits at the modifier-and-texture end of the grid, parallel to hewn and limned 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.

#45c0df
Original
#acbbe1
Protanopia
#97abdf
Deuteranopia
#00cbca
Tritanopia
#a8a8a8
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
2.13:1
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
9.86:1

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
##45C0DF
Display P3
Display P3
color(display-p3 0.4135 0.7429 0.8603)
P3 has subtle headroomOKLCH chroma 0.115

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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