#1b253f

Color #1b253f

A moderately saturated very dark blue.

Closest named color Charcoal #36454f · ΔE 18.4 Nearest Tailwind class slate-800 #1d293d · ΔE 3.6

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Conversions

HEX

#1b253f

RGB

rgb(27, 37, 63)

HSL

hsl(223.3, 40%, 17.6%)

HSV / HSB

hsv(223.3, 57.1%, 24.7%)

CMYK

cmyk(57.1%, 41.3%, 0%, 75.3%)

LAB

lab(15.03, 4.51, -17.95)

LCH

lch(15.03, 18.51, 284.1)

OKLCH

oklch(26.9%, 0.0507, 267.06)

HWB

hwb(223.3, 10.6%, 75.3%)

Harmony colors

Complementary

#3f351b

Analogous

#1b373f

#1b253f

#231b3f

Triadic

#1b253f

#3f1b25

#253f1b

Split-complementary

#1b253f

#3f231b

#373f1b

Tetradic

#1b253f

#351b3f

#3f351b

#253f1b

Square

#1b253f

#3f1b37

#3f351b

#1b3f23

Shades

Color #1b253f mixed toward black.

#161f34

#12192a

#0d121f

#090c15

#04060a

Tints

Color #1b253f mixed toward white.

#304270

#455fa1

#6c83c0

#9dadd5

#ced6ea

Tones

Color #1b253f mixed toward gray.

#1e263c

#212839

#242936

#272a33

#2a2c30

Accessibility

Aa White text on this color

15.18:1

Aa Black text on this color

1.38:1

White text reads better on this background (15.18:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#20203a · ΔE 4.2

Deuteranopia

#1f1e39 · ΔE 4.9

Tritanopia

#1c3534 · ΔE 18.7

Achromatopsia

#262626 · ΔE 13.4

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

Code

CSS

background-color: #1b253f;

Tailwind (arbitrary value)

bg-[#1b253f]

Related colors

Royal Blue #4169e1

Cornflower Blue #6495ed

Light Steel Blue #b0c4de

Light Slate Gray #778899

Slate Gray #708090

Dodger Blue #1e90ff

Frequently asked questions

#1b253f (#1b253f) is rgb(27, 37, 63) in RGB.

No, #1b253f 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 #1b253f, or check how it holds up for accessibility.

Generate a palette → Check contrast