#1B3287#1B3287

#1B3287 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.8% C 0.145 H 266.9°. Best body text is #FFFFFF at 11.34:1 contrast (WCAG AA passes).

Color values

HEX	#1B3287
RGB	rgb(27, 50, 135)
HSL	hsl(227, 67%, 32%)
HSV	hsv(227, 80%, 53%)
CMYK	cmyk(80%, 63%, 0%, 47.1%)
CIE-LAB	lab(24.52, 24.03, -49.98)
CIE-LCH	lch(24.52, 55.45, 295.68°)
OKLab	oklab(35.85% -0.0077 -0.1445)
OKLCH	oklch(35.85% 0.145 266.9)
XYZ	xyz(5.9642, 4.2628, 23.4254)
Luminance	0.0426 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3287 #87701B

analogous

#1B6887 #1B3287 #3A1B87

triadic

#1B3287 #871B32 #32871B

tetradic

#1B3287 #871B68 #87701B #1B873A

square

#1B3287 #871B68 #87701B #1B873A

split-complementary

#1B3287 #873A1B #68871B

monochromatic

#070C21 #111F54 #1B3287 #2545BA #4363D9

Accessibility & contrast

On white

11.34

#1B3287 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#1B3287 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3287

11.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3287	#FFFFFF	#000000	##FFFFFF
##1B3287	1.00	11.34	1.85	11.34
#FFFFFF	11.34	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F8A

Deuteranopia (green-blind)

#003585

Tritanopia (blue-blind)

#004857

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b3287;
/* rgb */ color: rgb(27, 50, 135);
/* oklch */ color: oklch(35.8% 0.145 266.9);

Tailwind

colors: {
  custom: {
    50: '#6a69ab',
    500: '#1b3287',
    950: '#000000',
  },
}

SCSS

$custom: #1b3287;
$custom-light: #6a69ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3287",
  "rgb": {
    "r": 27,
    "g": 50,
    "b": 135
  },
  "hsl": {
    "h": 227.222,
    "s": 66.667,
    "l": 31.765
  },
  "oklch": {
    "l": 0.35849,
    "c": 0.1447,
    "h": 266.9
  },
  "luminance": 0.04263
}

Semantic roles & 50–950 ramp

primary

#1B3287

secondary

#BAA144

accent

#C53EEA

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1B3287

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

Preview Lab → · Contrast checker → · Palette generator →