#1b3f8d

Color #1b3f8d

A moderately saturated dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 10.15 Nearest Tailwind class blue-900 #1c398e · ΔE 2.3

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Conversions

HEX

#1b3f8d

RGB

rgb(27, 63, 141)

HSL

hsl(221.1, 67.9%, 32.9%)

HSV / HSB

hsv(221.1, 80.9%, 55.3%)

CMYK

cmyk(80.9%, 55.3%, 0%, 44.7%)

LAB

lab(28.67, 17.4, -46.94)

LCH

lch(28.67, 50.06, 290.34)

OKLCH

oklch(39.1%, 0.1364, 263.01)

HWB

hwb(221.1, 10.6%, 44.7%)

Harmony colors

Complementary

#8d691b

Analogous

#1b788d

#1b3f8d

#301b8d

Triadic

#1b3f8d

#8d1b3f

#3f8d1b

Split-complementary

#1b3f8d

#8d301b

#788d1b

Tetradic

#1b3f8d

#691b8d

#8d691b

#3f8d1b

Square

#1b3f8d

#8d1b78

#8d691b

#1b8d30

Shades

Color #1b3f8d mixed toward black.

#163475

#122a5e

#0d1f46

#09152f

#040a17

Tints

Color #1b3f8d mixed toward white.

#2454bd

#3f70da

#6f94e4

#9fb8ed

#cfdbf6

Tones

Color #1b3f8d mixed toward gray.

#244283

#2e467a

#374970

#414d67

#4a505d

Accessibility

Aa White text on this color

9.8:1

Aa Black text on this color

2.14:1

White text reads better on this background (9.8:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#2e2f7f · ΔE 6.9

Deuteranopia

#2c297c · ΔE 8.4

Tritanopia

#1e7370 · ΔE 31.6

Achromatopsia

#444444 · ΔE 23.7

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

Code

CSS

background-color: #1b3f8d;

Tailwind (arbitrary value)

bg-[#1b3f8d]

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

#1b3f8d (#1b3f8d) is rgb(27, 63, 141) in RGB.

No, #1b3f8d 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 #1b3f8d, or check how it holds up for accessibility.

Generate a palette → Check contrast