#1B228D#1B228D

#1B228D is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.6% C 0.171 H 270.1°. Best body text is #FFFFFF at 12.65:1 contrast (WCAG AA passes).

Color values

HEX	#1B228D
RGB	rgb(27, 34, 141)
HSL	hsl(236, 68%, 33%)
HSV	hsv(236, 81%, 55%)
CMYK	cmyk(80.9%, 75.9%, 0%, 44.7%)
CIE-LAB	lab(21.21, 36.82, -59.17)
CIE-LCH	lch(21.21, 69.69, 301.89°)
OKLab	oklab(33.62% 0.0002 -0.1714)
OKLCH	oklch(33.62% 0.171 270.1)
XYZ	xyz(5.8301, 3.2995, 25.5237)
Luminance	0.0330 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B228D #8D861B

analogous

#1B5B8D #1B228D #4D1B8D

triadic

#1B228D #8D1B22 #228D1B

tetradic

#1B228D #8D1B5B #8D861B #1B8D4D

square

#1B228D #8D1B5B #8D861B #1B8D4D

split-complementary

#1B228D #8D4D1B #5B8D1B

monochromatic

#070926 #11165A #1B228D #252EC0 #4750DC

Accessibility & contrast

On white

12.65

#1B228D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.66

#1B228D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B228D

12.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B228D	#FFFFFF	#000000	##FFFFFF
##1B228D	1.00	12.65	1.66	12.65
#FFFFFF	12.65	1.00	21.00	1.00
#000000	1.66	21.00	1.00	21.00
##FFFFFF	12.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003990

Deuteranopia (green-blind)

#002D8B

Tritanopia (blue-blind)

#004156

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1b228d;
/* rgb */ color: rgb(27, 34, 141);
/* oklch */ color: oklch(33.6% 0.171 270.1);

Tailwind

colors: {
  custom: {
    50: '#6d5eb0',
    500: '#1b228d',
    950: '#000000',
  },
}

SCSS

$custom: #1b228d;
$custom-light: #6d5eb0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b228d",
  "rgb": {
    "r": 27,
    "g": 34,
    "b": 141
  },
  "hsl": {
    "h": 236.316,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.33617,
    "c": 0.17139,
    "h": 270.1
  },
  "luminance": 0.033
}

Semantic roles & 50–950 ramp

primary

#1B228D

secondary

#BDB646

accent

#E03DEB

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#080411

muted

#7B7980

Preview Lab

Preview with #1B228D

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

Preview Lab → · Contrast checker → · Palette generator →