#166cf4

Color #166cf4

A vivid, highly saturated medium blue.

Closest named color Royal Blue #4169e1 · ΔE 9.35 Nearest Tailwind class blue-600 #155dfc · ΔE 5.2

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

Conversions

HEX

#166cf4

RGB

rgb(22, 108, 244)

HSL

hsl(216.8, 91%, 52.2%)

HSV / HSB

hsv(216.8, 91%, 95.7%)

CMYK

cmyk(91%, 55.7%, 0%, 4.3%)

LAB

lab(48.79, 27.8, -74.43)

LCH

lch(48.79, 79.45, 290.48)

OKLCH

oklch(56.8%, 0.2185, 260.25)

HWB

hwb(216.8, 8.6%, 4.3%)

Harmony colors

Complementary

#f49e16

Analogous

#16dbf4

#166cf4

#2f16f4

Triadic

#166cf4

#f4166c

#6cf416

Split-complementary

#166cf4

#f42f16

#dbf416

Tetradic

#166cf4

#9e16f4

#f49e16

#6cf416

Square

#166cf4

#f416db

#f49e16

#16f42f

Shades

Color #166cf4 mixed toward black.

#0a58d4

#0846a9

#06357f

#042355

#02122a

Tints

Color #166cf4 mixed toward white.

#3d84f6

#649df8

#8bb5fa

#b1cefb

#d8e6fd

Tones

Color #166cf4 mixed toward gray.

#2970e2

#3b74cf

#4e79bd

#607daa

#738198

Accessibility

Aa White text on this color

4.68:1

Aa Black text on this color

4.49:1

White text reads better on this background (4.68:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#4b4bdd · ΔE 12.2

Deuteranopia

#4640d7 · ΔE 14.9

Tritanopia

#21c8c3 · ΔE 41.7

Achromatopsia

#747474 · ΔE 28.5

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

Code

CSS

background-color: #166cf4;

Tailwind (arbitrary value)

bg-[#166cf4]

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

#166cf4 (#166cf4) is rgb(22, 108, 244) in RGB.

No, #166cf4 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 #166cf4, or check how it holds up for accessibility.

Generate a palette → Check contrast