#1b3a77

Color #1b3a77

A moderately saturated dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 15.56 Nearest Tailwind class blue-900 #1c398e · ΔE 3.9

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

Conversions

HEX

#1b3a77

RGB

rgb(27, 58, 119)

HSL

hsl(219.8, 63%, 28.6%)

HSV / HSB

hsv(219.8, 77.3%, 46.7%)

CMYK

cmyk(77.3%, 51.3%, 0%, 53.3%)

LAB

lab(25.53, 11.92, -38.27)

LCH

lch(25.53, 40.08, 287.3)

OKLCH

oklch(36.2%, 0.1109, 262.13)

HWB

hwb(219.8, 10.6%, 53.3%)

Harmony colors

Complementary

#77581b

Analogous

#1b6877

#1b3a77

#2a1b77

Triadic

#1b3a77

#771b3a

#3a771b

Split-complementary

#1b3a77

#772a1b

#68771b

Tetradic

#1b3a77

#581b77

#77581b

#3a771b

Square

#1b3a77

#771b68

#77581b

#1b772a

Shades

Color #1b3a77 mixed toward black.

#163063

#12274f

#0d1d3b

#091328

#040a14

Tints

Color #1b3a77 mixed toward white.

#2652a8

#396dd2

#6b91dd

#9cb6e9

#cedaf4

Tones

Color #1b3a77 mixed toward gray.

#233c6f

#2a3f68

#324160

#3a4458

#414651

Accessibility

Aa White text on this color

10.95:1

Aa Black text on this color

1.92:1

White text reads better on this background (10.95:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#2b2c6c · ΔE 6.7

Deuteranopia

#2a2769 · ΔE 8.1

Tritanopia

#1d6260 · ΔE 27.6

Achromatopsia

#3c3c3c · ΔE 21.4

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

Code

CSS

background-color: #1b3a77;

Tailwind (arbitrary value)

bg-[#1b3a77]

Related colors

Cornflower Blue #6495ed

Royal Blue #4169e1

Light Steel Blue #b0c4de

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Frequently asked questions

#1b3a77 (#1b3a77) is rgb(27, 58, 119) in RGB.

No, #1b3a77 is not web-safe. The nearest web-safe colors are among its tones and shades below.

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 #1b3a77, or check how it holds up for accessibility.

Generate a palette → Check contrast