#1B227A#1B227A

#1B227A is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.5% C 0.146 H 271.1°. Best body text is #FFFFFF at 13.49:1 contrast (WCAG AA passes).

Color values

HEX	#1B227A
RGB	rgb(27, 34, 122)
HSL	hsl(236, 64%, 29%)
HSV	hsv(236, 78%, 48%)
CMYK	cmyk(77.9%, 72.1%, 0%, 52.2%)
CIE-LAB	lab(19.15, 29.86, -50.58)
CIE-LCH	lch(19.15, 58.74, 300.55°)
OKLab	oklab(31.53% 0.0029 -0.1464)
OKLCH	oklch(31.53% 0.146 271.1)
XYZ	xyz(4.5357, 2.7817, 18.7065)
Luminance	0.0278 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B227A #7A731B

analogous

#1B527A #1B227A #441B7A

triadic

#1B227A #7A1B22 #227A1B

tetradic

#1B227A #7A1B52 #7A731B #1B7A44

square

#1B227A #7A1B52 #7A731B #1B7A44

split-complementary

#1B227A #7A441B #527A1B

monochromatic

#060719 #101448 #1B227A #2630AC #3C47D4

Accessibility & contrast

On white

13.49

#1B227A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#1B227A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B227A

13.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B227A	#FFFFFF	#000000	##FFFFFF
##1B227A	1.00	13.49	1.56	13.49
#FFFFFF	13.49	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00337D

Deuteranopia (green-blind)

#002A78

Tritanopia (blue-blind)

#003A4B

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b227a;
/* rgb */ color: rgb(27, 34, 122);
/* oklch */ color: oklch(31.5% 0.146 271.1);

Tailwind

colors: {
  custom: {
    50: '#685da1',
    500: '#1b227a',
    950: '#000000',
  },
}

SCSS

$custom: #1b227a;
$custom-light: #685da1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b227a",
  "rgb": {
    "r": 27,
    "g": 34,
    "b": 122
  },
  "hsl": {
    "h": 235.579,
    "s": 63.758,
    "l": 29.216
  },
  "oklch": {
    "l": 0.31528,
    "c": 0.14642,
    "h": 271.1
  },
  "luminance": 0.02782
}

Semantic roles & 50–950 ramp

primary

#1B227A

secondary

#AEA643

accent

#DB41E7

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1B227A

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

Preview Lab → · Contrast checker → · Palette generator →