#1B228A#1B228A

#1B228A is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.3% C 0.168 H 270.2°. Best body text is #FFFFFF at 12.79:1 contrast (WCAG AA passes).

Color values

HEX	#1B228A
RGB	rgb(27, 34, 138)
HSL	hsl(236, 67%, 32%)
HSV	hsv(236, 80%, 54%)
CMYK	cmyk(80.4%, 75.4%, 0%, 45.9%)
CIE-LAB	lab(20.87, 35.75, -57.85)
CIE-LCH	lch(20.87, 68.00, 301.71°)
OKLab	oklab(33.28% 0.0007 -0.1675)
OKLCH	oklch(33.28% 0.168 270.2)
XYZ	xyz(5.6099, 3.2114, 24.3640)
Luminance	0.0321 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B228A #8A831B

analogous

#1B5A8A #1B228A #4B1B8A

triadic

#1B228A #8A1B22 #228A1B

tetradic

#1B228A #8A1B5A #8A831B #1B8A4B

square

#1B228A #8A1B5A #8A831B #1B8A4B

split-complementary

#1B228A #8A4B1B #5A8A1B

monochromatic

#070924 #111557 #1B228A #252FBD #454EDB

Accessibility & contrast

On white

12.79

#1B228A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#1B228A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B228A

12.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B228A	#FFFFFF	#000000	##FFFFFF
##1B228A	1.00	12.79	1.64	12.79
#FFFFFF	12.79	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00388D

Deuteranopia (green-blind)

#002D88

Tritanopia (blue-blind)

#004054

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b228a;
/* rgb */ color: rgb(27, 34, 138);
/* oklch */ color: oklch(33.3% 0.168 270.2);

Tailwind

colors: {
  custom: {
    50: '#6d5ead',
    500: '#1b228a',
    950: '#000000',
  },
}

SCSS

$custom: #1b228a;
$custom-light: #6d5ead;
$custom-dark: #000000;

JSON

{
  "hex": "#1b228a",
  "rgb": {
    "r": 27,
    "g": 34,
    "b": 138
  },
  "hsl": {
    "h": 236.216,
    "s": 67.273,
    "l": 32.353
  },
  "oklch": {
    "l": 0.3328,
    "c": 0.16755,
    "h": 270.2
  },
  "luminance": 0.03212
}

Semantic roles & 50–950 ramp

primary

#1B228A

secondary

#BCB445

accent

#DF3EEA

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1B228A

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

Preview Lab → · Contrast checker → · Palette generator →