Persian Blue (#1C39BB)

The hex code for Persian Blue is #1C39BB. It is rgb(28, 57, 187) in RGB, hsl(229, 74%, 42%) in HSL, and about cmyk(85%, 70%, 0%, 27%) in CMYK — a mid-tone blue. White text is the more readable choice on this background.

#1C39BB

HEX#1C39BB

RGBrgb(28, 57, 187)

HSLhsl(229, 74%, 42%)

HSVhsv(229, 85%, 73%)

CMYKcmyk(85%, 70%, 0%, 27%)

OKLCHoklch(42.3% 0.205 266.5)

LABlab(29.92% 30.47 -72.38)

LCHlch(29.92% 78.53 292.83)

Colors Closest to Persian Blue

Persian Blue is a registered color name. These are the named colors nearest to it, measured as CIE76 distance in CIELAB — a perceptual scale, so the ordering matches what the eye sees rather than how close the raw RGB numbers happen to sit.

Egyptian Blue#1034A6ΔE 8.9 Samsung Blue#12279EΔE 9.06 Denim Blue#2243B6ΔE 10.27 Royal Azure#0038A8ΔE 10.5 Philippine Blue#0038A7ΔE 11.07 Imperial Blue#002395ΔE 11.87

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

#1C39BB Channel Values

How Persian Blue 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 187	8-bit channels as sent to the display
HSL	H 229° · S 74% · L 42%	Easiest model for building lighter and darker variants
HSV	H 229° · S 85% · V 73%	Matches the picker in most design tools
CMYK	C 85% · M 70% · Y 0% · K 27%	Approximate ink mix; confirm with an ICC profile before printing
Luminance	8.93:1 vs white · 2.35:1 vs black	WCAG 2.2 relative-luminance contrast ratios

Text Contrast & Accessibility

WCAG 2.2 contrast ratios for text on a Persian Blue 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 text8.93:1AA normal ✓AA large ✓AAA normal ✓

TextBlack text2.35:1AA normal ✗AA large ✗AAA normal ✗

Need a specific ratio against another background? Open #1C39BB in the contrast checker.

Colors That Go With Persian Blue

Pairings derived from color-wheel relationships. The complementary color sits opposite Persian Blue; 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 Persian Blue

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 #1C39BB.

How Persian Blue 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#1C39BB

Protanopia#3535BB

Protanomaly#2D37BB

Deuteranopia#3131BB

Deuteranomaly#2A35BB

Tritanopia#005858

Tritanomaly#004E8B

Achromatopsia#4A4A4A

Test a full palette in the color blindness simulator.

Using #1C39BB in Code

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

CSS custom property--persian-blue: #1C39BB;

CSS backgroundbackground-color: #1C39BB;

Tailwind configcolors: { 'persian-blue': '#1C39BB' }

SwiftUIColor(red: 0.110, green: 0.224, blue: 0.733)

Android XML<color name="persian_blue">#1C39BB</color>

SVG fillfill="#1C39BB"

More Blue Colors

Persian Blue sits in the bluefamily. These are its neighbours across that family's full range, each with its own breakdown.

1d293d 1c398e 1d2951 1b03a3 1d44b9 1a5ddb 1e174a 1974d2 1e1a4d 193cb8 1e2939 191980 2a2069 372aac 4e5180 6495ed 7b7be5 9999eb bbbbf2 d6ebff f5f5ff 0000f5 0070b8 0d0d3b

#1C39BB Frequently Asked Questions

What is the hex code for Persian Blue?

The hex code for Persian Blue is #1C39BB. That is rgb(28, 57, 187) in RGB, hsl(229, 74%, 42%) in HSL, and approximately cmyk(85%, 70%, 0%, 27%) in CMYK.

What is the RGB value of #1C39BB?

#1C39BB is rgb(28, 57, 187) — red 28, green 57, and blue 187 on the 0-255 scale.

What is the CMYK value of #1C39BB?

#1C39BB converts to approximately cmyk(85%, 70%, 0%, 27%). CMYK output is a mathematical approximation for planning; confirm production print colors with your printer and ICC profile.

Should text on #1C39BB be black or white?

White text is the more readable choice. #1C39BB scores 8.93:1 against white and 2.35:1 against black, and WCAG 2.2 asks for at least 4.5:1 for normal body text.

Can I write #1C39BB as a CSS color keyword?

No. #1C39BB 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 slateblue (#6A5ACD) at a CIE76 distance of 20.05, which is visibly different.

Open Persian Blue 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.