#1f3d71

Color #1f3d71

A moderately saturated dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 20.57 Nearest Tailwind class blue-900 #1c398e · ΔE 5.2

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

Conversions

HEX

#1f3d71

RGB

rgb(31, 61, 113)

HSL

hsl(218, 56.9%, 28.2%)

HSV / HSB

hsv(218, 72.6%, 44.3%)

CMYK

cmyk(72.6%, 46%, 0%, 55.7%)

LAB

lab(26.22, 8, -33.35)

LCH

lch(26.22, 34.3, 283.49)

OKLCH

oklch(36.7%, 0.0967, 260.6)

HWB

hwb(218, 12.2%, 55.7%)

Harmony colors

Complementary

#71531f

Analogous

#1f6671

#1f3d71

#2a1f71

Triadic

#1f3d71

#711f3d

#3d711f

Split-complementary

#1f3d71

#712a1f

#66711f

Tetradic

#1f3d71

#531f71

#71531f

#3d711f

Square

#1f3d71

#711f66

#71531f

#1f712a

Shades

Color #1f3d71 mixed toward black.

#1a335e

#15294b

#0f1e38

#0a1426

#050a13

Tints

Color #1f3d71 mixed toward white.

#2c57a1

#3f72ca

#6f96d8

#9fb9e5

#cfdcf2

Tones

Color #1f3d71 mixed toward gray.

#263f6a

#2d4163

#33425c

#3a4456

#41464f

Accessibility

Aa White text on this color

10.69:1

Aa Black text on this color

1.96:1

White text reads better on this background (10.69:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#2f2f67 · ΔE 7.4

Deuteranopia

#2d2a65 · ΔE 8.6

Tritanopia

#215f5d · ΔE 25.5

Achromatopsia

#3e3e3e · ΔE 19.6

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

Code

CSS

background-color: #1f3d71;

Tailwind (arbitrary value)

bg-[#1f3d71]

Related colors

Cornflower Blue #6495ed

Light Steel Blue #b0c4de

Royal Blue #4169e1

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Frequently asked questions

#1f3d71 (#1f3d71) is rgb(31, 61, 113) in RGB.

No, #1f3d71 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.

Try it → Accessibility

Contrast Checker

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

Try it → Generators

Palette Generator

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

Try it →

Build something with this color

Generate a full palette from #1f3d71, or check how it holds up for accessibility.

Generate a palette → Check contrast