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Buttoned Umber Verdigris

#1fb4b7
Notes

Buttoned Umber Verdigris (#1FB4B7) 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 (181°, 71%, 42%) 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
#1fb4b7
RGB
rgb(31, 180, 183)
HSL
hsl(181, 71%, 42%)
HWB
hwb(181 12% 28%)
OKLCH
oklch(70.1% 0.114 197.1)
P3
color(display-p3 0.3359 0.6956 0.7114)
HSV
hsv(181, 83%, 72%)
LAB
lab(66.79% -34.65 -12.04)
LCH
lch(66.79% 36.69 199.17)
CMYK
cmyk(83%, 2%, 0%, 28%)

Etymology

Buttoned
adjective

Old French bouton, button — past-participle of button. As a color modifier, buttoned implies a clear-and-fastened-and-formal quality, the crisp color of Edwardian-period formal-attire fully-fastened-and-formally-dressed gentleman's-attire. Sits at the crisp-and-finished end of the grid, parallel to trim and pressed in usage.

Umber
modifier

Latin umbra, shadow. As a color modifier, umber implies a shadowed-and-Umbrian-earth-pigment quality, the visual register of Caravaggio-and-Rembrandt-umber hand-shadowed-and-Umbrian-earth-pigment Caravaggio-and-Rembrandt-and-Vermeer-Dutch-Golden-Age umbered-and-shadowed-and-deep-glazed surfaces under Caravaggio-and-Rembrandt-and-Vermeer chiaroscuro-and-tenebrist-and-glazed studio-window-light. Sits at the modifier-and-mood end of the grid, parallel to shade and gloom in usage.

Verdigris
noun

The basic copper carbonate that forms on weathered copper and bronze — the pigment scraped from oxidized metal and used in Renaissance painting before being supplanted by more stable greens. The color refers to a thick verdigris on aged copper roofing or the Statue of Liberty's surface: a soft, slightly muted blue-green with the powdery finish of mineral oxide. Cooler than patina, warmer than seafoam, with the archaeological weight of a mineral made by time.

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.

#1fb4b7
Original
#a7abb7
Protanopia
#939cb8
Deuteranopia
#00bab5
Tritanopia
#959595
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
2.54:1
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
8.27:1

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
##1FB4B7
Display P3
Display P3
color(display-p3 0.3359 0.6956 0.7114)
P3 has subtle headroomOKLCH chroma 0.114

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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