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Welcoming Path Peacock

#51c4fb
Notes

Welcoming Path Peacock (#51C4FB) is a true cyan with a neon character. It sits at the high-saturation edge of its family. Use it sparingly, as signage, accent, or highlight against darker surfaces. Its HSL profile (199°, 96%, 65%) 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 orange. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#51c4fb
RGB
rgb(81, 196, 251)
HSL
hsl(199, 96%, 65%)
HWB
hwb(199 32% 2%)
OKLCH
oklch(77.7% 0.129 232.7)
P3
color(display-p3 0.4438 0.7589 0.9639)
HSV
hsv(199, 68%, 98%)
LAB
lab(74.94% -15.63 -36.57)
LCH
lch(74.94% 39.77 246.86)
CMYK
cmyk(68%, 22%, 0%, 2%)

Etymology

Welcoming
adjective

Old English wel-cuman, well-coming — present-participle of welcome. As a color modifier, welcoming implies a clear-and-inviting-and-warm quality where the hue carries the visual register of cordial-and-hospitable color-tone. Sits at the crisp-and-cheerful end of the grid, parallel to hospitable and inviting in usage.

Path
modifier

Old English pæth, foot-trodden way. As a color modifier, path implies a foot-worn-pasture-track quality, the visual register of South-Downs-Way-and-Pennine-Way foot-trodden chalk-and-limestone-and-peat long-distance walking-track surfaces under hill-and-moorland English-walking-country light. Sits at the modifier-and-place end of the grid, parallel to lane and road in usage.

Peacock
noun

Pavo cristatus, the Indian peafowl whose male displays the most elaborate sexual ornament in birds — a fan of two-meter eyespotted tail feathers in iridescent blue-green. The color is structural, not pigmented: created by interference patterns in the feather barbules. Peacock blue refers to the dominant body color: a saturated, slightly muted teal-blue with the optical depth of structural color. Cooler than persian, warmer than sapphire.

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.

#51c4fb
Original
#a9c2fe
Protanopia
#92b1fa
Deuteranopia
#00d3d6
Tritanopia
#b0b0b0
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
1.97:1
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
10.64:1

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
##51C4FB
Display P3
Display P3
color(display-p3 0.4438 0.7589 0.9639)
P3 has subtle headroomOKLCH chroma 0.129

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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