#1B227B#1B227B

#1B227B is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.6% C 0.148 H 271.1°. Best body text is #FFFFFF at 13.45:1 contrast (WCAG AA passes).

Color values

HEX	#1B227B
RGB	rgb(27, 34, 123)
HSL	hsl(236, 64%, 29%)
HSV	hsv(236, 78%, 48%)
CMYK	cmyk(78%, 72.4%, 0%, 51.8%)
CIE-LAB	lab(19.25, 30.24, -51.05)
CIE-LCH	lch(19.25, 59.33, 300.64°)
OKLab	oklab(31.64% 0.0028 -0.1477)
OKLCH	oklch(31.64% 0.148 271.1)
XYZ	xyz(4.5980, 2.8066, 19.0345)
Luminance	0.0281 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B227B #7B741B

analogous

#1B527B #1B227B #441B7B

triadic

#1B227B #7B1B22 #227B1B

tetradic

#1B227B #7B1B52 #7B741B #1B7B44

square

#1B227B #7B1B52 #7B741B #1B7B44

split-complementary

#1B227B #7B441B #527B1B

monochromatic

#060719 #101449 #1B227B #2630AD #3C47D4

Accessibility & contrast

On white

13.45

#1B227B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#1B227B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B227B

13.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B227B	#FFFFFF	#000000	##FFFFFF
##1B227B	1.00	13.45	1.56	13.45
#FFFFFF	13.45	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00337E

Deuteranopia (green-blind)

#002A79

Tritanopia (blue-blind)

#003B4B

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1b227b;
/* rgb */ color: rgb(27, 34, 123);
/* oklch */ color: oklch(31.6% 0.148 271.1);

Tailwind

colors: {
  custom: {
    50: '#695da2',
    500: '#1b227b',
    950: '#000000',
  },
}

SCSS

$custom: #1b227b;
$custom-light: #695da2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b227b",
  "rgb": {
    "r": 27,
    "g": 34,
    "b": 123
  },
  "hsl": {
    "h": 235.625,
    "s": 64,
    "l": 29.412
  },
  "oklch": {
    "l": 0.31635,
    "c": 0.14777,
    "h": 271.1
  },
  "luminance": 0.02807
}

Semantic roles & 50–950 ramp

primary

#1B227B

secondary

#AFA743

accent

#DB41E7

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1B227B

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

Preview Lab → · Contrast checker → · Palette generator →