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Booming Kimono Ultramarine

#4d7ad1
Notes

Booming Kimono Ultramarine (#4D7AD1) 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°, 59%, 56%) 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
#4d7ad1
RGB
rgb(77, 122, 209)
HSL
hsl(220, 59%, 56%)
HWB
hwb(220 30% 18%)
OKLCH
oklch(59.0% 0.142 262.3)
P3
color(display-p3 0.3417 0.4738 0.7953)
HSV
hsv(220, 63%, 82%)
LAB
lab(51.95% 11.89 -49.55)
LCH
lch(51.95% 50.96 283.49)
CMYK
cmyk(63%, 42%, 0%, 18%)

Etymology

Booming
adjective

Imitative-onomatopoeic origin — present-participle of boom, sharing root with Dutch bommen. As a color modifier, booming implies a saturated-and-loud-and-confident quality where the hue announces itself with full visual amplitude. Sits at the bold-and-resonant end of the grid, parallel to resounding and thunderous.

Kimono
modifier

Japanese kimono, thing-to-wear. As a color modifier, kimono implies a Japanese-kimono-and-furisode-and-tomesode quality, the visual register of Edo-and-Heian-kimono-and-furisode hand-Japanese-kimono-and-furisode-and-tomesode Edo-and-Heian-kimono-and-furisode-and-Kyoto-Nishijin kimono-and-Japanese-kimono-and-furisode surfaces under Edo-and-Heian-kimono-and-furisode-and-Kyoto-Nishijin Heian-Kyoto-and-Edo-Tokugawa Japanese-court-light. Sits at the modifier-and-textile end of the grid, parallel to haori and sari in usage.

Ultramarine
noun

The pigment ground from lapis lazuli — the Afghan mineral imported through Venice in the late Middle Ages, more expensive by weight than gold during the Renaissance. The color refers to a freshly mixed ultramarine pigment in linseed oil: a saturated, slightly violet-shifted deep blue with the matte finish of micron-ground rock. Deeper than cobalt, cooler than royal, with the art-historical weight of the blue Vermeer reserved for Mary's robe.

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.

#4d7ad1
Original
#5382d4
Protanopia
#3f76cf
Deuteranopia
#008e9b
Tritanopia
#777777
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
4.18:1
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
5.02:1

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
##4D7AD1
Display P3
Display P3
color(display-p3 0.3417 0.4738 0.7953)
P3 has subtle headroomOKLCH chroma 0.142

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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