#1B228B#1B228B

#1B228B is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.4% C 0.169 H 270.2°. Best body text is #FFFFFF at 12.74:1 contrast (WCAG AA passes).

Color values

HEX	#1B228B
RGB	rgb(27, 34, 139)
HSL	hsl(236, 67%, 33%)
HSV	hsv(236, 81%, 55%)
CMYK	cmyk(80.6%, 75.5%, 0%, 45.5%)
CIE-LAB	lab(20.98, 36.10, -58.29)
CIE-LCH	lch(20.98, 68.57, 301.77°)
OKLab	oklab(33.39% 0.0005 -0.1688)
OKLCH	oklch(33.39% 0.169 270.2)
XYZ	xyz(5.6826, 3.2405, 24.7471)
Luminance	0.0324 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B228B #8B841B

analogous

#1B5A8B #1B228B #4C1B8B

triadic

#1B228B #8B1B22 #228B1B

tetradic

#1B228B #8B1B5A #8B841B #1B8B4C

square

#1B228B #8B1B5A #8B841B #1B8B4C

split-complementary

#1B228B #8B4C1B #5A8B1B

monochromatic

#070925 #111558 #1B228B #252FBE #454FDB

Accessibility & contrast

On white

12.74

#1B228B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#1B228B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B228B

12.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B228B	#FFFFFF	#000000	##FFFFFF
##1B228B	1.00	12.74	1.65	12.74
#FFFFFF	12.74	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00388E

Deuteranopia (green-blind)

#002D89

Tritanopia (blue-blind)

#004154

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b228b;
/* rgb */ color: rgb(27, 34, 139);
/* oklch */ color: oklch(33.4% 0.169 270.2);

Tailwind

colors: {
  custom: {
    50: '#6d5eae',
    500: '#1b228b',
    950: '#000000',
  },
}

SCSS

$custom: #1b228b;
$custom-light: #6d5eae;
$custom-dark: #000000;

JSON

{
  "hex": "#1b228b",
  "rgb": {
    "r": 27,
    "g": 34,
    "b": 139
  },
  "hsl": {
    "h": 236.25,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.33392,
    "c": 0.16883,
    "h": 270.2
  },
  "luminance": 0.03241
}

Semantic roles & 50–950 ramp

primary

#1B228B

secondary

#BCB545

accent

#E03DEA

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1B228B

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

Preview Lab → · Contrast checker → · Palette generator →