#311dc5

Color #311dc5

A vivid, highly saturated medium blue.

Closest named color Medium Blue #0000cd · ΔE 13.87 Nearest Tailwind class indigo-800 #372aac · ΔE 3.7

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

Conversions

HEX

#311dc5

RGB

rgb(49, 29, 197)

HSL

hsl(247.1, 74.3%, 44.3%)

HSV / HSB

hsv(247.1, 85.3%, 77.3%)

CMYK

cmyk(75.1%, 85.3%, 0%, 22.7%)

LAB

lab(28.28, 58.44, -81.25)

LCH

lch(28.28, 100.08, 305.73)

OKLCH

oklch(40.8%, 0.2354, 273.7)

HWB

hwb(247.1, 11.4%, 22.7%)

Harmony colors

Complementary

#b1c51d

Analogous

#1d5dc5

#311dc5

#851dc5

Triadic

#311dc5

#c5311d

#1dc531

Split-complementary

#311dc5

#c5851d

#5dc51d

Tetradic

#311dc5

#c51db1

#b1c51d

#1dc531

Square

#311dc5

#c51d5d

#b1c51d

#1dc585

Shades

Color #311dc5 mixed toward black.

#2918a4

#211383

#180f62

#100a42

#080521

Tints

Color #311dc5 mixed toward white.

#4631e1

#6b5ae7

#9083ed

#b5acf3

#dad6f9

Tones

Color #311dc5 mixed toward gray.

#3c2bb7

#4639a9

#51479b

#5c558d

#66637f

Accessibility

Aa White text on this color

9.94:1

Aa Black text on this color

2.11:1

White text reads better on this background (9.94:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#2a29af · ΔE 3.6

Deuteranopia

#2b2ca9 · ΔE 4.6

Tritanopia

#309a95 · ΔE 46.3

Achromatopsia

#434343 · ΔE 30.8

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

Code

CSS

background-color: #311dc5;

Tailwind (arbitrary value)

bg-[#311dc5]

Related colors

Slate Blue #6a5acd

Dark Slate Blue #483d8b

Medium Slate Blue #7b68ee

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Frequently asked questions

#311dc5 (#311dc5) is rgb(49, 29, 197) in RGB.

No, #311dc5 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 #311dc5, or check how it holds up for accessibility.

Generate a palette → Check contrast