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Gallant Indaco

#4273d3
Notes

Gallant Indaco (#4273D3) is a true azure 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 (220°, 62%, 54%) 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 amber. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#4273d3
RGB
rgb(66, 115, 211)
HSL
hsl(220, 62%, 54%)
HWB
hwb(220 26% 17%)
OKLCH
oklch(57.1% 0.157 262.3)
HSV
hsv(220, 69%, 83%)
LAB
lab(49.64% 15.10 -54.40)
LCH
lch(49.64% 56.46 285.52)
CMYK
cmyk(69%, 45%, 0%, 17%)

Etymology

Gallant
adjective

Old French galant, brave / charming — present-participle of galer (to make merry). As a color modifier, gallant implies a saturated-and-chivalrous-and-confident quality, the deep-rich color of Three-Musketeers and Cyrano-de-Bergerac swashbuckling adventure tradition. Sits at the bold-and-chivalrous end of the grid, parallel to valiant and heroic.

Indaco
noun

The Italian word for indigo — borrowed via Greek indikon (Indian thing). Indaco in Italian art vocabulary refers specifically to the deep-blue plant-dye pigment used in Italian Renaissance painting for the Marian mantles and aristocratic dress. The color refers to indaco pigment in tempera: a saturated, slightly cool deep blue. The Italian cousin of indigo.

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

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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.

#4273d3
Original
#427dd7
Protanopia
#2670d1
Deuteranopia
#008999
Tritanopia
#707070
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).
AAon White
4.54:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAon Black
4.62:1

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