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Rousing Prism Turquoise

#4feddb
Notes

Rousing Prism Turquoise (#4FEDDB) is a true teal with a vibrant character. It holds its own as a focal accent, carrying visual weight without tipping into neon territory. Its HSL profile (173°, 81%, 62%) places it in the highly saturated band at a mid lightness. Best used in small doses, like logos, CTAs, focus rings, or highlight text, where its saturation becomes a feature rather than noise. 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
#4feddb
RGB
rgb(79, 237, 219)
HSL
hsl(173, 81%, 62%)
HWB
hwb(173 31% 7%)
OKLCH
oklch(86.0% 0.132 184.2)
P3
color(display-p3 0.5007 0.9169 0.8584)
HSV
hsv(173, 67%, 93%)
LAB
lab(85.68% -44.87 -3.32)
LCH
lch(85.68% 44.99 184.23)
CMYK
cmyk(67%, 0%, 8%, 7%)

Etymology

Rousing
adjective

Old English rūsan, to rush — present-participle of rouse. As a color modifier, rousing implies a saturated-and-wakening-and-active quality, the bright color of dawn-chorus-and-morning-bell atmospheric-and-aural stimulation. Sits at the bright-and-active end of the grid, parallel to awakening and invigorating in usage.

Prism
modifier

Greek πρῖσμα, something-sawn. As a color modifier, prism implies a Newtonian-rainbow-and-spectrum-splitting quality, the visual register of Newton-Optics-and-Cambridge-prism hand-Newtonian-rainbow-and-spectrum-splitting Newton-Optics-and-Cambridge-and-Trinity-College-prism prism-and-Newtonian-rainbow-and-spectrum-splitting surfaces under Newton-Optics-and-Cambridge-and-Trinity-College-prism 17th-century-natural-philosophy-and-rainbow-experiment spectrum-light. Sits at the modifier-and-cosmic end of the grid, parallel to corona and plasma 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.

#4feddb
Original
#e2e0da
Protanopia
#cbcfdd
Deuteranopia
#00f2e7
Tritanopia
#cacaca
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
1.45:1
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
14.47:1

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
##4FEDDB
Display P3
Display P3
color(display-p3 0.5007 0.9169 0.8584)
P3 has subtle headroomOKLCH chroma 0.132

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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