#1B3187#1B3187

#1B3187 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.6% C 0.146 H 267.2°. Best body text is #FFFFFF at 11.44:1 contrast (WCAG AA passes).

Color values

HEX	#1B3187
RGB	rgb(27, 49, 135)
HSL	hsl(228, 67%, 32%)
HSV	hsv(228, 80%, 53%)
CMYK	cmyk(80%, 63.7%, 0%, 47.1%)
CIE-LAB	lab(24.25, 24.72, -50.42)
CIE-LCH	lch(24.25, 56.15, 296.12°)
OKLab	oklab(35.65% -0.0071 -0.1458)
OKLCH	oklch(35.65% 0.146 267.2)
XYZ	xyz(5.9220, 4.1782, 23.4113)
Luminance	0.0418 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3187 #87711B

analogous

#1B6787 #1B3187 #3B1B87

triadic

#1B3187 #871B31 #31871B

tetradic

#1B3187 #871B67 #87711B #1B873B

square

#1B3187 #871B67 #87711B #1B873B

split-complementary

#1B3187 #873B1B #67871B

monochromatic

#070C21 #111E54 #1B3187 #2544BA #4362D9

Accessibility & contrast

On white

11.44

#1B3187 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#1B3187 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3187

11.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3187	#FFFFFF	#000000	##FFFFFF
##1B3187	1.00	11.44	1.84	11.44
#FFFFFF	11.44	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F8A

Deuteranopia (green-blind)

#003585

Tritanopia (blue-blind)

#004757

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b3187;
/* rgb */ color: rgb(27, 49, 135);
/* oklch */ color: oklch(35.6% 0.146 267.2);

Tailwind

colors: {
  custom: {
    50: '#6a68ab',
    500: '#1b3187',
    950: '#000000',
  },
}

SCSS

$custom: #1b3187;
$custom-light: #6a68ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3187",
  "rgb": {
    "r": 27,
    "g": 49,
    "b": 135
  },
  "hsl": {
    "h": 227.778,
    "s": 66.667,
    "l": 31.765
  },
  "oklch": {
    "l": 0.35649,
    "c": 0.14597,
    "h": 267.2
  },
  "luminance": 0.04179
}

Semantic roles & 50–950 ramp

primary

#1B3187

secondary

#BAA244

accent

#C73EEA

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1B3187

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

Preview Lab → · Contrast checker → · Palette generator →