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Functional Hemp Turquoise

#3fb9ca
Notes

Functional Hemp Turquoise (#3FB9CA) 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 (187°, 57%, 52%) 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
#3fb9ca
RGB
rgb(63, 185, 202)
HSL
hsl(187, 57%, 52%)
HWB
hwb(187 25% 21%)
OKLCH
oklch(72.6% 0.108 208.4)
P3
color(display-p3 0.3915 0.7157 0.7820)
HSV
hsv(187, 69%, 79%)
LAB
lab(69.48% -27.81 -18.40)
LCH
lch(69.48% 33.34 213.48)
CMYK
cmyk(69%, 8%, 0%, 21%)

Etymology

Functional
adjective

Latin fūnctiō, performance — adjectival suffix -al. As a color modifier, functional implies a clear-and-purpose-fit-and-utilitarian quality, the crisp color of Mid-Century-Modern and Bauhaus form-follows-function design-aesthetic. Sits at the crisp-and-functional end of the grid, parallel to practical and utilitarian in usage.

Hemp
modifier

Old English henep, hemp-plant. As a color modifier, hemp implies a coarse-bast-fiber quality, the visual register of Russian-and-Italian-and-Far-East-hemp hand-retted-and-spun-hemp-fiber bast-fiber rope-and-canvas-and-cordage hemp-textile surfaces under hand-retted-and-spun-hemp working light. Sits at the modifier-and-texture end of the grid, parallel to cord and twine 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.

#3fb9ca
Original
#a9b2cb
Protanopia
#95a3ca
Deuteranopia
#00c1be
Tritanopia
#a0a0a0
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
2.33:1
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
9.00:1

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
##3FB9CA
Display P3
Display P3
color(display-p3 0.3915 0.7157 0.7820)
P3 has subtle headroomOKLCH chroma 0.108

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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