#1b3785

Color #1b3785

A moderately saturated dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 9.35 Nearest Tailwind class blue-900 #1c398e · ΔE 1.4

Open in Palette generator Color wheel Color mixer Contrast checker Blindness simulator Gradient

Conversions

HEX

#1b3785

RGB

rgb(27, 55, 133)

HSL

hsl(224.2, 66.3%, 31.4%)

HSV / HSB

hsv(224.2, 79.7%, 52.2%)

CMYK

cmyk(79.7%, 58.6%, 0%, 47.8%)

LAB

lab(25.74, 19.74, -46.74)

LCH

lch(25.74, 50.74, 292.9)

OKLCH

oklch(36.7%, 0.1354, 265.21)

HWB

hwb(224.2, 10.6%, 47.8%)

Harmony colors

Complementary

#85691b

Analogous

#1b6c85

#1b3785

#341b85

Triadic

#1b3785

#851b37

#37851b

Split-complementary

#1b3785

#85341b

#6c851b

Tetradic

#1b3785

#691b85

#85691b

#37851b

Square

#1b3785

#851b6c

#85691b

#1b8534

Shades

Color #1b3785 mixed toward black.

#162e6f

#122559

#0d1b43

#09122c

#040916

Tints

Color #1b3785 mixed toward white.

#254bb6

#3d66d8

#6e8ce2

#9eb2eb

#cfd9f5

Tones

Color #1b3785 mixed toward gray.

#243b7c

#2d3f73

#36446b

#3e4862

#474c59

Accessibility

Aa White text on this color

10.87:1

Aa Black text on this color

1.93:1

White text reads better on this background (10.87:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#2a2a78 · ΔE 5.5

Deuteranopia

#282674 · ΔE 6.5

Tritanopia

#1d6c69 · ΔE 31.8

Achromatopsia

#3d3d3d · ΔE 23.9

Left half is the original, right half is the simulated appearance. See all 8 vision types →

Code

CSS

background-color: #1b3785;

Tailwind (arbitrary value)

bg-[#1b3785]

Related colors

Royal Blue #4169e1

Cornflower Blue #6495ed

Light Steel Blue #b0c4de

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Frequently asked questions

#1b3785 (#1b3785) is rgb(27, 55, 133) in RGB.

No, #1b3785 is not one of the 216 web-safe colors — for that, every RGB channel would have to be a multiple of 51.

Related tools

Colors

HEX to RGB Converter

Convert any HEX color code to its RGB and HSL equivalents, live, with copy-to-clipboard values.

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Contrast Checker

Check the WCAG contrast ratio between any two colors, live, with AA/AAA pass-fail results.

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Palette Generator

Generate complementary, analogous, triadic, split-complementary, tetradic, square, and monochromatic palettes from any base color.

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Build something with this color

Generate a full palette from #1b3785, or check how it holds up for accessibility.

Generate a palette → Check contrast