#1237c9

Color #1237c9

A vivid, highly saturated medium blue.

Closest named color Dark Blue #00008b · ΔE 20.07 Nearest Tailwind class blue-800 #193cb8 · ΔE 2.7

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

Conversions

HEX

#1237c9

RGB

rgb(18, 55, 201)

HSL

hsl(227.9, 83.6%, 42.9%)

HSV / HSB

hsv(227.9, 91%, 78.8%)

CMYK

cmyk(91%, 72.6%, 0%, 21.2%)

LAB

lab(31.98, 45.09, -77.49)

LCH

lch(31.98, 89.65, 300.19)

OKLCH

oklch(43.2%, 0.2256, 265.14)

HWB

hwb(227.9, 7.1%, 21.2%)

Harmony colors

Complementary

#c9a412

Analogous

#1292c9

#1237c9

#4912c9

Triadic

#1237c9

#c91237

#37c912

Split-complementary

#1237c9

#c94912

#92c912

Tetradic

#1237c9

#a412c9

#c9a412

#37c912

Square

#1237c9

#c91292

#c9a412

#12c949

Shades

Color #1237c9 mixed toward black.

#0f2ea7

#0c2586

#091b64

#061243

#030921

Tints

Color #1237c9 mixed toward white.

#2049eb

#4d6eef

#7992f3

#a6b6f7

#d2dbfb

Tones

Color #1237c9 mixed toward gray.

#2140ba

#3049aa

#40529b

#4f5b8c

#5e647d

Accessibility

Aa White text on this color

8.69:1

Aa Black text on this color

2.42:1

White text reads better on this background (8.69:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#2727b3 · ΔE 4.9

Deuteranopia

#2522ad · ΔE 6.2

Tritanopia

#159f9a · ΔE 45.5

Achromatopsia

#4b4b4b · ΔE 29.7

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

Code

CSS

background-color: #1237c9;

Tailwind (arbitrary value)

bg-[#1237c9]

Related colors

Royal Blue #4169e1

Cornflower Blue #6495ed

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Frequently asked questions

#1237c9 (#1237c9) is rgb(18, 55, 201) in RGB.

No, #1237c9 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.

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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 #1237c9, or check how it holds up for accessibility.

Generate a palette → Check contrast