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Trustworthy Loki Lagoon

#40b4d1
Notes

Trustworthy Loki Lagoon (#40B4D1) is a true cyan with a cool character. It leans cool, sitting on the blue, green, and violet side of the wheel. Quiet and dependable, a fit for product UI and data visualization. Its HSL profile (192°, 61%, 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
#40b4d1
RGB
rgb(64, 180, 209)
HSL
hsl(192, 61%, 54%)
HWB
hwb(192 25% 18%)
OKLCH
oklch(71.7% 0.109 217.9)
HSV
hsv(192, 69%, 82%)
LAB
lab(68.27% -23.01 -24.09)
LCH
lch(68.27% 33.31 226.31)
CMYK
cmyk(69%, 14%, 0%, 18%)

Etymology

Trustworthy
adjective

Old English trēow, trust — adjectival suffix -worthy. As a color modifier, trustworthy implies a clear-and-reliable-and-honest quality where the hue carries the visual register of confidence-deserving-and-faithful-performance design-element. Sits at the crisp-and-honest end of the grid, parallel to reliable and dependable in usage.

Loki
modifier

Old Norse Loki, trickster-god-and-shape-shifter. As a color modifier, loki implies a trickster-and-shape-shifter-and-sly quality, the visual register of Norse-Loki-and-Asgard-trickster hand-trickster-and-shape-shifter-and-sly Norse-Loki-and-Asgard-trickster-and-Ragnarok loki-and-trickster-and-shape-shifter-and-sly surfaces under Norse-Loki-and-Asgard-trickster-and-Ragnarok Yggdrasil-and-Aesir-pantheon shape-shifter-light. Sits at the modifier-and-myth end of the grid, parallel to thor and odin 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

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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.

#40b4d1
Original
#a1afd3
Protanopia
#8da0d1
Deuteranopia
#00bebd
Tritanopia
#9d9d9d
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
2.42:1
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
8.67:1

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