#18288a

Color #18288a

A vivid, highly saturated dark blue.

Closest named color Midnight Blue #191970 · ΔE 8.83 Nearest Tailwind class indigo-900 #312c85 · ΔE 3

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Conversions

HEX

#18288a

RGB

rgb(24, 40, 138)

HSL

hsl(231.6, 70.4%, 31.8%)

HSV / HSB

hsv(231.6, 82.6%, 54.1%)

CMYK

cmyk(82.6%, 71%, 0%, 45.9%)

LAB

lab(22.11, 31.69, -55.81)

LCH

lch(22.11, 64.18, 299.59)

OKLCH

oklch(34.1%, 0.1618, 268.23)

HWB

hwb(231.6, 9.4%, 45.9%)

Harmony colors

Complementary

#8a7a18

Analogous

#18618a

#18288a

#41188a

Triadic

#18288a

#8a1828

#288a18

Split-complementary

#18288a

#8a4118

#618a18

Tetradic

#18288a

#7a188a

#8a7a18

#288a18

Square

#18288a

#8a1861

#8a7a18

#188a41

Shades

Color #18288a mixed toward black.

#142173

#101b5c

#0c1445

#080d2e

#040717

Tints

Color #18288a mixed toward white.

#2136bc

#3950dd

#6b7ce5

#9ca8ee

#ced3f6

Tones

Color #18288a mixed toward gray.

#222f81

#2b3677

#353d6e

#3e4364

#484a5b

Accessibility

Aa White text on this color

12.29:1

Aa Black text on this color

1.71:1

White text reads better on this background (12.29:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#20207b · ΔE 3.2

Deuteranopia

#1f1e77 · ΔE 3.9

Tritanopia

#196d6a · ΔE 35.4

Achromatopsia

#353535 · ΔE 26.4

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

Code

CSS

background-color: #18288a;

Tailwind (arbitrary value)

bg-[#18288a]

Related colors

Royal Blue #4169e1

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Ghost White #f8f8ff

Frequently asked questions

#18288a (#18288a) is rgb(24, 40, 138) in RGB.

No, #18288a 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 #18288a, or check how it holds up for accessibility.

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