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Bleak Carolina

#153b5b
Notes

Bleak Carolina (#153B5B) 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 (207°, 63%, 22%) 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
#153b5b
RGB
rgb(21, 59, 91)
HSL
hsl(207, 63%, 22%)
HWB
hwb(207 8% 64%)
OKLCH
oklch(34.2% 0.071 247.2)
P3
color(display-p3 0.1228 0.2281 0.3467)
HSV
hsv(207, 77%, 36%)
LAB
lab(23.81% -1.22 -23.01)
LCH
lch(23.81% 23.04 266.97)
CMYK
cmyk(77%, 35%, 0%, 64%)

Etymology

Bleak
adjective

Old Norse bleikr, pale — sharing root with English bleach. As a color modifier, bleak implies a deep-and-cold-and-comfortless quality, the dark gray-pale of Yorkshire-Moors and Hebrides late-winter atmospheric-light. Sits at the deep-and-cool end of the grid, parallel to grim and bitter in atmospheric register.

Carolina
noun

The official athletic blue of the University of North Carolina at Chapel Hill — a soft, slightly washed pale blue first adopted in the 1880s and now associated with one of the most visually distinctive college sports brands in the United States. The color refers to a UNC athletic-jersey blue: a soft, slightly muted pale blue with the matte finish of woven knit polyester. Lighter than periwinkle, cooler than powder.

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.

#153b5b
Original
#2d3c5c
Protanopia
#23365a
Deuteranopia
#004346
Tritanopia
#353535
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
11.61:1
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
1.81:1

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
##153B5B
Display P3
Display P3
color(display-p3 0.1228 0.2281 0.3467)
Inside sRGBOKLCH chroma 0.071

This color sits well within the sRGB cube. P3 and sRGB share the gray axis and most desaturated tones, so a P3 display renders this identically to an sRGB display.

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