#1b3b6d

Color #1b3b6d

A moderately saturated dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 21.95 Nearest Tailwind class blue-900 #1c398e · ΔE 5.6

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Conversions

HEX

#1b3b6d

RGB

rgb(27, 59, 109)

HSL

hsl(216.6, 60.3%, 26.7%)

HSV / HSB

hsv(216.6, 75.2%, 42.7%)

CMYK

cmyk(75.2%, 45.9%, 0%, 57.3%)

LAB

lab(25.15, 7.12, -32.52)

LCH

lch(25.15, 33.29, 282.35)

OKLCH

oklch(35.7%, 0.0947, 259.11)

HWB

hwb(216.6, 10.6%, 57.3%)

Harmony colors

Complementary

#6d4d1b

Analogous

#1b646d

#1b3b6d

#241b6d

Triadic

#1b3b6d

#6d1b3b

#3b6d1b

Split-complementary

#1b3b6d

#6d241b

#646d1b

Tetradic

#1b3b6d

#4d1b6d

#6d4d1b

#3b6d1b

Square

#1b3b6d

#6d1b64

#6d4d1b

#1b6d24

Shades

Color #1b3b6d mixed toward black.

#17315b

#122749

#0e1e37

#091424

#050a12

Tints

Color #1b3b6d mixed toward white.

#27569f

#3772ce

#6995da

#9bb8e6

#cddcf3

Tones

Color #1b3b6d mixed toward gray.

#223d66

#293e5f

#304059

#364152

#3d434b

Accessibility

Aa White text on this color

11.09:1

Aa Black text on this color

1.89:1

White text reads better on this background (11.09:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#2c2c64 · ΔE 7.8

Deuteranopia

#2a2861 · ΔE 8.8

Tritanopia

#1d5b59 · ΔE 25

Achromatopsia

#3c3c3c · ΔE 19.3

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

Code

CSS

background-color: #1b3b6d;

Tailwind (arbitrary value)

bg-[#1b3b6d]

Related colors

Cornflower Blue #6495ed

Light Steel Blue #b0c4de

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Royal Blue #4169e1

Frequently asked questions

#1b3b6d (#1b3b6d) is rgb(27, 59, 109) in RGB.

No, #1b3b6d 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 #1b3b6d, or check how it holds up for accessibility.

Generate a palette → Check contrast