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Effective Pisces Kingfisher

#37ccc1
Notes

Effective Pisces Kingfisher (#37CCC1) 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 (176°, 59%, 51%) 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
#37ccc1
RGB
rgb(55, 204, 193)
HSL
hsl(176, 59%, 51%)
HWB
hwb(176 22% 20%)
OKLCH
oklch(76.7% 0.122 187.5)
P3
color(display-p3 0.4081 0.7888 0.7547)
HSV
hsv(176, 73%, 80%)
LAB
lab(74.73% -40.39 -5.65)
LCH
lch(74.73% 40.78 187.97)
CMYK
cmyk(73%, 0%, 5%, 20%)

Etymology

Effective
adjective

Latin effectīvus, productive — adjectival suffix -ive. As a color modifier, effective implies a clear-and-purpose-achieving quality where the hue carries the visual register of successful-task-completion design-element. Sits at the crisp-and-functional end of the grid, parallel to practical and useful in usage.

Pisces
modifier

Latin pisces, fishes-of-the-zodiac. As a color modifier, pisces implies a two-fishes-and-water-sign-and-Jupiter-Neptune-ruled-mutable-water quality, the visual register of Hellenic-Pisces-and-Aphrodite-Eros-fishes hand-two-fishes-and-water-sign-and-Jupiter-Neptune-ruled-mutable-water Hellenic-Pisces-and-Aphrodite-Eros-fishes-and-Ichthys pisces-and-two-fishes-and-water-sign surfaces under Hellenic-Pisces-and-Aphrodite-Eros-fishes-and-Ichthys late-winter-and-February-and-March-into-April mutable-water-sign-light. Sits at the modifier-and-zodiac end of the grid, parallel to aquarius and aries in usage.

Kingfisher
noun

The family Alcedinidae — particularly Alcedo atthis, the European common kingfisher whose iridescent turquoise-blue plumage gives the color its name. The color refers to a male European kingfisher's wing: a saturated, slightly cool deep blue-green with the iridescent satin finish of structurally colored feathers.

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.

#37ccc1
Original
#c1c1c1
Protanopia
#acb1c2
Deuteranopia
#00d1c8
Tritanopia
#acacac
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
1.99:1
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
10.57:1

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
##37CCC1
Display P3
Display P3
color(display-p3 0.4081 0.7888 0.7547)
P3 has subtle headroomOKLCH chroma 0.122

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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