colors
Back to gallery

Spotless Lazuli

#1f5a8d
Notes

Spotless Lazuli (#1F5A8D) is a deep azure 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 (208°, 64%, 34%) places it in the balanced band at a dark lightness. It works well as a headline, icon, or deep background in an otherwise light layout, pairing cleanly with cream, bone, and warm neutrals. 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
#1f5a8d
RGB
rgb(31, 90, 141)
HSL
hsl(208, 64%, 34%)
HWB
hwb(208 12% 45%)
OKLCH
oklch(45.6% 0.103 248.5)
P3
color(display-p3 0.1878 0.3480 0.5373)
HSV
hsv(208, 78%, 55%)
LAB
lab(36.98% -0.22 -33.62)
LCH
lch(36.98% 33.62 269.62)
CMYK
cmyk(78%, 36%, 0%, 45%)

Etymology

Spotless
adjective

Old English spott (spot) plus suffix -less. As a color modifier, spotless implies a clear-and-unmarked quality where the hue carries no contaminating speck or stain. Sits at the crisp-and-clean end of the grid, parallel to pristine and unblemished in usage.

Lazuli
noun

Passerina amoena, the lazuli bunting — a North American songbird whose males display saturated deep-blue plumage with white wing bars and chestnut breasts. Named for the gemstone (lapis lazuli) the bird's plumage resembles. The color refers to a male lazuli bunting in breeding plumage: a saturated, slightly cool deep blue.

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.

#1f5a8d
Original
#425d8f
Protanopia
#32528c
Deuteranopia
#00666d
Tritanopia
#515151
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
7.23:1
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
2.91:1

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
##1F5A8D
Display P3
Display P3
color(display-p3 0.1878 0.3480 0.5373)
P3 has subtle headroomOKLCH chroma 0.103

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