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Straightforward Lurk Turquoise

#39d7cc
Notes

Straightforward Lurk Turquoise (#39D7CC) 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°, 66%, 53%) 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
#39d7cc
RGB
rgb(57, 215, 204)
HSL
hsl(176, 66%, 53%)
HWB
hwb(176 22% 16%)
OKLCH
oklch(79.8% 0.127 187.9)
P3
color(display-p3 0.4292 0.8314 0.7976)
HSV
hsv(176, 73%, 84%)
LAB
lab(78.36% -42.03 -6.20)
LCH
lch(78.36% 42.49 188.38)
CMYK
cmyk(73%, 0%, 5%, 16%)

Etymology

Straightforward
adjective

English compound straight + forward — sharing root with German geradeaus. As a color modifier, straightforward implies a clear-and-direct-and-unencumbered quality where the hue carries the visual register of clear-aim-and-uncomplicated character. Sits at the crisp-and-honest end of the grid, parallel to candid and direct in usage.

Lurk
modifier

Middle English lurken, to-lie-hidden. As a color modifier, lurk implies a hidden-and-watching-and-shadowed quality, the visual register of forest-edge-and-alley-mouth-lurk hand-hidden-and-watching-and-shadowed forest-edge-and-alley-mouth-and-bridge-undercroft lurked-and-hidden-and-watching-and-shadowed surfaces under forest-edge-and-alley-mouth-and-bridge-undercroft Gothic-novel-and-fairy-tale-and-noir half-light. Sits at the modifier-and-mood end of the grid, parallel to creep and prowl 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

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.

#39d7cc
Original
#cbcbcc
Protanopia
#b5bbcd
Deuteranopia
#00dcd3
Tritanopia
#b5b5b5
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
1.78:1
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
11.77:1

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
##39D7CC
Display P3
Display P3
color(display-p3 0.4292 0.8314 0.7976)
P3 has subtle headroomOKLCH chroma 0.127

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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