#3700b1

Color #3700b1

A vivid, highly saturated dark blue.

Closest named color Medium Blue #0000cd · ΔE 15.61 Nearest Tailwind class violet-900 #4d179a · ΔE 4.6

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

Conversions

HEX

#3700b1

RGB

rgb(55, 0, 177)

HSL

hsl(258.6, 100%, 34.7%)

HSV / HSB

hsv(258.6, 100%, 69.4%)

CMYK

cmyk(68.9%, 100%, 0%, 30.6%)

LAB

lab(23.62, 61.32, -77.1)

LCH

lch(23.62, 98.51, 308.5)

OKLCH

oklch(37.1%, 0.2253, 279.37)

HWB

hwb(258.6, 0%, 30.6%)

Harmony colors

Complementary

#7ab100

Analogous

#0022b1

#3700b1

#8f00b1

Triadic

#3700b1

#b13700

#00b137

Split-complementary

#3700b1

#b18f00

#22b100

Tetradic

#3700b1

#b1007a

#7ab100

#00b137

Square

#3700b1

#b10022

#7ab100

#00b18f

Shades

Color #3700b1 mixed toward black.

#2e0093

#250076

#1b0058

#12003b

#09001d

Tints

Color #3700b1 mixed toward white.

#4800e8

#6621ff

#8c58ff

#b290ff

#d9c7ff

Tones

Color #3700b1 mixed toward gray.

#3c0fa2

#421d93

#482c85

#4d3b76

#534a67

Accessibility

Aa White text on this color

11.68:1

Aa Black text on this color

1.8:1

White text reads better on this background (11.68:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#28289c · ΔE 6.4

Deuteranopia

#2b2d97 · ΔE 7.9

Tritanopia

#368984 · ΔE 43.5

Achromatopsia

#383838 · ΔE 30.6

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

Code

CSS

background-color: #3700b1;

Tailwind (arbitrary value)

bg-[#3700b1]

Related colors

Medium Purple #9370db

Dark Slate Blue #483d8b

Medium Slate Blue #7b68ee

Slate Blue #6a5acd

Rebecca Purple #663399

Blue Violet #8a2be2

Frequently asked questions

#3700b1 (#3700b1) is rgb(55, 0, 177) in RGB.

No, #3700b1 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 #3700b1, or check how it holds up for accessibility.

Generate a palette → Check contrast