colors
Back to gallery

Anchored Stoop Sapphire

#153aa6
Notes

Anchored Stoop Sapphire (#153AA6) is a true blue with a jewel character. It carries the deep, saturated richness of a gemstone. Authoritative and slightly formal, it works well for type and heavy UI elements. Its HSL profile (225°, 78%, 37%) 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 amber. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#153aa6
RGB
rgb(21, 58, 166)
HSL
hsl(225, 78%, 37%)
HWB
hwb(225 8% 35%)
OKLCH
oklch(40.2% 0.178 264.6)
P3
color(display-p3 0.1214 0.2242 0.6265)
HSV
hsv(225, 87%, 65%)
LAB
lab(29.25% 30.30 -61.23)
LCH
lch(29.25% 68.32 296.33)
CMYK
cmyk(87%, 65%, 0%, 35%)

Etymology

Anchored
adjective

The past participle of anchor, used since the late nineteenth century as a metaphor for secured in place. As a color word, anchored implies a deep saturated tone that grounds a palette — the dark blues, deep greens, and browns that hold a composition together. Sits in the bold-and-deep corner of the grid alongside solid.

Stoop
modifier

Dutch stoep, front-step. As a color modifier, stoop implies a small-porch-and-front-step quality, the visual register of American-and-Dutch-stoop hand-built small-front-porch-and-front-step Brooklyn-and-Dutch-Colonial-stoop architectural surfaces under American-and-Dutch-Colonial stoop-and-front-step neighborhood light. Sits at the modifier-and-architecture end of the grid, parallel to atrium and loggia in usage.

Sapphire
noun

An iron-and-titanium-bearing corundum — the same mineral as ruby, hardness 9 on the Mohs scale, mined for two millennia from Sri Lanka, Burma, Madagascar, and the Cashmere mines of British India. The color refers to a fine Kashmir-cut sapphire: a saturated, slightly violet-shifted deep blue with the gem's signature internal velvet — a quality of light scattering in the stone that faceted glass cannot replicate. Cooler than cobalt, deeper than azure.

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.

#153aa6
Original
#004ca9
Protanopia
#003ea4
Deuteranopia
#00576a
Tritanopia
#3a3a3a
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).
AAAon White
9.60:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
Failon Black
2.19:1

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
##153AA6
Display P3
Display P3
color(display-p3 0.1214 0.2242 0.6265)
P3 has subtle headroomOKLCH chroma 0.178

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.

Related Colors

Canvas