#1C398E Color

#1C398E is rgb(28, 57, 142) in RGB, hsl(225, 67%, 33%) in HSL, and about cmyk(80%, 60%, 0%, 44%) in CMYK. It has no registered color name of its own — the closest is St. Patrick's Blue (#23297A), clearly related but distinguishable side by side at ΔE 8.23. White text is the more readable choice on this background.

#1C398E

HEX#1C398E

RGBrgb(28, 57, 142)

HSLhsl(225, 67%, 33%)

HSVhsv(225, 80%, 56%)

CMYKcmyk(80%, 60%, 0%, 44%)

OKLCHoklch(38% 0.145 265.5)

LABlab(26.25% 15.50 -51.29)

LCHlch(26.25% 53.58 286.81)

What #1C398E Is Called

Most hex codes have no name: there are 16.7 million of them and a few thousand registered names. These are the named colors nearest to #1C398E, ordered by CIE76 distance in CIELAB. Anything under about ΔE 2 is a difference most people cannot see.

St. Patrick's Blue#23297AΔE 8.23 Cosmic Cobalt#2E2D88ΔE 9.22 Cobalt Blue#0047ABΔE 10.27 Smalt (Dark Powder Blue)#003399ΔE 11.02 Dark Slate Blue#483D8BΔE 11.15 Iron Indigo#184FA1ΔE 11.16

Browse the full index of named colors A-Z or every blue in the library.

#1C398E Channel Values

How #1C398E breaks down in each color model. Hue is measured in degrees around the color wheel; saturation, lightness, and the CMYK inks are percentages.

Model	Channels	Notes
RGB	R 28 · G 57 · B 142	8-bit channels as sent to the display
HSL	H 225° · S 67% · L 33%	Easiest model for building lighter and darker variants
HSV	H 225° · S 80% · V 56%	Matches the picker in most design tools
CMYK	C 80% · M 60% · Y 0% · K 44%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	10.37:1 vs white · 2.03:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a #1C398E background. AA requires 4.5:1 for normal text and 3:1 for large text; AAA requires 7:1. Contrast is one check, not a full accessibility review.

TextWhite text10.37:1AA normal AA large AAA normal

Fails AABlack text2.03:1AA normal AA large AAA normal

Need a specific ratio against another background? Open #1C398E in the contrast checker.

Colors That Go With #1C398E

Pairings derived from color-wheel relationships. The complementary color sits opposite #1C398E; analogous colors sit beside it; triadic and split-complementary sets spread evenly around the wheel. Select any swatch for its own breakdown.

Base

Complementary

Analogous

Analogous

Triadic

Triadic

Split comp.

Split comp.

Tints & Shades of #1C398E

Lighter tints and darker shades built by moving the lightness channel while holding hue and saturation, which is what you want for hover states, backgrounds, and text variants.

Tints

Shades

Want a full 50-950 ramp with semantic roles? Generate design tokens from #1C398E.

How #1C398E Looks with Color Vision Deficiency

Simulated with the Viénot, Brettel & Mollon LMS projection model. Anomalous types are rendered as partial versions of the matching dichromacy, which is an approximation rather than a per-person clinical model.

Typical#1C398E

Protanopia#35358E

Protanomaly#2D378E

Deuteranopia#31318E

Deuteranomaly#2A358E

Tritanopia#004B4B

Tritanomaly#00446C

Achromatopsia#404040

Test a full palette in the color blindness simulator.

Using #1C398E in Code

Copy-ready declarations for the places this color usually ends up.

CSS custom property--color-1c398e: #1C398E;

CSS backgroundbackground-color: #1C398E;

Tailwind configcolors: { 'color-1c398e': '#1C398E' }

SwiftUIColor(red: 0.110, green: 0.224, blue: 0.557)

Android XML<color name="color_1c398e">#1C398E</color>

SVG fillfill="#1C398E"

More Blue Colors

#1C398E sits in the blue family. These are its neighbours across that family's full range, each with its own breakdown.

1c39bb 1b1b3a 1d293d 1b03a3 1d2951 1a5ddb 1d44b9 1a4065 1e174a 1974d2 1e1a4d 193cb8 2a2069 372a89 4d4dff 627dca 7979e2 94b1ff b6e1fc d3edfd f2f2fc 0000eb 006db0 0d0d3b

#1C398E Frequently Asked Questions

What color is #1C398E?

#1C398E is a dark blue — rgb(28, 57, 142) in RGB and hsl(225, 67%, 33%) in HSL. It carries no registered color name of its own; the closest named color is St. Patrick's Blue (#23297A), which is clearly related but distinguishable side by side at a CIE76 distance of 8.23.

What is the RGB value of #1C398E?

#1C398E is rgb(28, 57, 142) — red 28, green 57, and blue 142 on the 0-255 scale.

What is the CMYK value of #1C398E?

#1C398E converts to approximately cmyk(80%, 60%, 0%, 44%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #1C398E be black or white?

White text is the more readable choice. #1C398E scores 10.37:1 against white and 2.03:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #1C398E as a CSS color keyword?

No. #1C398E is not one of the CSS color keywords, so it has to be written as a hex, rgb() or hsl() value. The closest keyword is darkslateblue (#483D8B) at a CIE76 distance of 11.15, which is visibly different.

Open #1C398E in a Tool

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Keep exploring: every blue in the color library, the guide to shades of blue, or the full color library.