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Stately Creep Ultramarine

#2b4dcf
Notes

Stately Creep Ultramarine (#2B4DCF) is a true blue with a vibrant character. It holds its own as a focal accent, carrying visual weight without tipping into neon territory. Its HSL profile (228°, 66%, 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 amber. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#2b4dcf
RGB
rgb(43, 77, 207)
HSL
hsl(228, 66%, 49%)
HWB
hwb(228 17% 19%)
OKLCH
oklch(48.3% 0.204 266.8)
P3
color(display-p3 0.1998 0.2986 0.7821)
HSV
hsv(228, 79%, 81%)
LAB
lab(38.42% 35.09 -70.35)
LCH
lch(38.42% 78.61 296.51)
CMYK
cmyk(79%, 63%, 0%, 19%)

Etymology

Stately
adjective

An adjectival form of state, condition of dignity. Used as a color modifier since the seventeenth century for the deep saturated jewel tones of formal ceremony — the deep blue of a robes-of-state, the deep red of a state-banquet velvet. Sits in the bold-and-formal corner alongside imperial and royal, with slightly less institutional weight.

Creep
modifier

Old English crēopan, to-move-slowly. As a color modifier, creep implies a slow-stealthy-and-spreading quality, the visual register of ivy-on-wall-and-mist-creep hand-slow-stealthy-and-spreading ivy-on-wall-and-mist-creep-and-spreading-shadow crept-and-slow-stealthy-and-spreading surfaces under ivy-on-wall-and-mist-creep-and-spreading-shadow ruined-cloister-and-river-valley-and-evening-meadow encroaching-light. Sits at the modifier-and-mood end of the grid, parallel to lurk and prowl 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.

#2b4dcf
Original
#0062d3
Protanopia
#0053cd
Deuteranopia
#006f87
Tritanopia
#4f4f4f
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
6.85:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AA Largeon Black
3.07:1

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
##2B4DCF
Display P3
Display P3
color(display-p3 0.1998 0.2986 0.7821)
P3 has visible headroomOKLCH chroma 0.204

This color is chromatic enough that authoring it as P3 native (instead of clamping to sRGB) gives a perceptibly more saturated render on wide-gamut displays — modern Macs, iPhones, iPads, and most recent OLED laptops.

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