#1b3c70

Color #1b3c70

A moderately saturated dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 20.9 Nearest Tailwind class blue-900 #1c398e · ΔE 5.3

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

Conversions

HEX

#1b3c70

RGB

rgb(27, 60, 112)

HSL

hsl(216.7, 61.2%, 27.3%)

HSV / HSB

hsv(216.7, 75.9%, 43.9%)

CMYK

cmyk(75.9%, 46.4%, 0%, 56.1%)

LAB

lab(25.67, 7.65, -33.61)

LCH

lch(25.67, 34.47, 282.82)

OKLCH

oklch(36.2%, 0.0979, 259.23)

HWB

hwb(216.7, 10.6%, 56.1%)

Harmony colors

Complementary

#704f1b

Analogous

#1b6770

#1b3c70

#251b70

Triadic

#1b3c70

#701b3c

#3c701b

Split-complementary

#1b3c70

#70251b

#67701b

Tetradic

#1b3c70

#4f1b70

#704f1b

#3c701b

Square

#1b3c70

#701b67

#704f1b

#1b7025

Shades

Color #1b3c70 mixed toward black.

#17325e

#12284b

#0e1e38

#091425

#050a13

Tints

Color #1b3c70 mixed toward white.

#2757a2

#3873cf

#6a96db

#9bb9e7

#cddcf3

Tones

Color #1b3c70 mixed toward gray.

#223e69

#293f62

#30415b

#374254

#3f444d

Accessibility

Aa White text on this color

10.9:1

Aa Black text on this color

1.93:1

White text reads better on this background (10.9:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#2d2d66 · ΔE 7.9

Deuteranopia

#2b2864 · ΔE 9.1

Tritanopia

#1e5e5c · ΔE 25.5

Achromatopsia

#3d3d3d · ΔE 19.6

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

Code

CSS

background-color: #1b3c70;

Tailwind (arbitrary value)

bg-[#1b3c70]

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

#1b3c70 (#1b3c70) is rgb(27, 60, 112) in RGB.

No, #1b3c70 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 #1b3c70, or check how it holds up for accessibility.

Generate a palette → Check contrast