#1B4387#1B4387

#1B4387 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 39.5% C 0.123 H 260.3°. Best body text is #FFFFFF at 9.55:1 contrast (WCAG AA passes).

Color values

HEX	#1B4387
RGB	rgb(27, 67, 135)
HSL	hsl(218, 67%, 32%)
HSV	hsv(218, 80%, 53%)
CMYK	cmyk(80%, 50.4%, 0%, 47.1%)
CIE-LAB	lab(29.40, 12.18, -42.05)
CIE-LCH	lch(29.40, 43.78, 286.16°)
OKLab	oklab(39.53% -0.0206 -0.1209)
OKLCH	oklch(39.53% 0.123 260.3)
XYZ	xyz(6.8307, 5.9958, 23.7143)
Luminance	0.0600 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4387 #875F1B

analogous

#1B7987 #1B4387 #291B87

triadic

#1B4387 #871B43 #43871B

tetradic

#1B4387 #871B79 #875F1B #1B8729

square

#1B4387 #871B79 #875F1B #1B8729

split-complementary

#1B4387 #87291B #79871B

monochromatic

#071021 #112A54 #1B4387 #255CBA #437BD9

Accessibility & contrast

On white

9.55

#1B4387 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#1B4387 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4387

9.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4387	#FFFFFF	#000000	##FFFFFF
##1B4387	1.00	9.55	2.20	9.55
#FFFFFF	9.55	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B4B89

Deuteranopia (green-blind)

#004186

Tritanopia (blue-blind)

#00535E

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1b4387;
/* rgb */ color: rgb(27, 67, 135);
/* oklch */ color: oklch(39.5% 0.123 260.3);

Tailwind

colors: {
  custom: {
    50: '#6976aa',
    500: '#1b4387',
    950: '#000000',
  },
}

SCSS

$custom: #1b4387;
$custom-light: #6976aa;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4387",
  "rgb": {
    "r": 27,
    "g": 67,
    "b": 135
  },
  "hsl": {
    "h": 217.778,
    "s": 66.667,
    "l": 31.765
  },
  "oklch": {
    "l": 0.39535,
    "c": 0.12264,
    "h": 260.3
  },
  "luminance": 0.05997
}

Semantic roles & 50–950 ramp

primary

#1B4387

secondary

#BA8E44

accent

#AA3EEA

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B4387

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →