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Buttressed Mallorca

#288fd3
Notes

Buttressed Mallorca (#288FD3) is a true azure with a vibrant character. It holds its own as a focal accent, carrying visual weight without tipping into neon territory. Its HSL profile (204°, 68%, 49%) 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 orange. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#288fd3
RGB
rgb(40, 143, 211)
HSL
hsl(204, 68%, 49%)
HWB
hwb(204 16% 17%)
OKLCH
oklch(62.5% 0.137 243.3)
P3
color(display-p3 0.2854 0.5529 0.8056)
HSV
hsv(204, 81%, 83%)
LAB
lab(56.88% -5.05 -42.94)
LCH
lch(56.88% 43.24 263.30)
CMYK
cmyk(81%, 32%, 0%, 17%)

Etymology

Buttressed
adjective

Old French bouterez, thrusting-mass — past-participle of buttress, derived from bouter (to thrust). As a color modifier, buttressed implies a saturated-and-architecturally-supported quality, the deep-rich color of Gothic-Cathedral flying-buttress-and-rib-vault stone-architecture. Sits at the bold-and-fortified end of the grid, parallel to fortified and reinforced.

Mallorca
noun

The largest Balearic island — and the saturated deep blue of Mallorcan Tramuntana coastline at Cala Tuent and Sa Calobra. Mallorca color refers to the cove water at Sa Calobra: a saturated, slightly cool deep blue with the optical depth of cold-water Mediterranean cove against limestone cliff.

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.

#288fd3
Original
#6f91d6
Protanopia
#5782d2
Deuteranopia
#00a0a7
Tritanopia
#7e7e7e
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).
AA Largeon White
3.52:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAon Black
5.96:1

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
##288FD3
Display P3
Display P3
color(display-p3 0.2854 0.5529 0.8056)
P3 has subtle headroomOKLCH chroma 0.137

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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