#1B3776#1B3776

#1B3776 is a dark, moderate blue. Relative luminance 0.043; OKLCH L 35.4% C 0.113 H 263.6°. Best body text is #FFFFFF at 11.32:1 contrast (WCAG AA passes).

Color values

HEX	#1B3776
RGB	rgb(27, 55, 118)
HSL	hsl(222, 63%, 28%)
HSV	hsv(222, 77%, 46%)
CMYK	cmyk(77.1%, 53.4%, 0%, 53.7%)
CIE-LAB	lab(24.55, 13.63, -39.22)
CIE-LCH	lch(24.55, 41.52, 289.16°)
OKLab	oklab(35.44% -0.0126 -0.1128)
OKLCH	oklch(35.44% 0.113 263.6)
XYZ	xyz(5.0870, 4.2728, 17.6927)
Luminance	0.0427 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3776 #765A1B

analogous

#1B6476 #1B3776 #2C1B76

triadic

#1B3776 #761B37 #37761B

tetradic

#1B3776 #761B64 #765A1B #1B762C

square

#1B3776 #761B64 #765A1B #1B762C

split-complementary

#1B3776 #762C1B #64761B

monochromatic

#060C19 #102044 #1B3776 #264EA8 #3A68D2

Accessibility & contrast

On white

11.32

#1B3776 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#1B3776 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3776

11.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3776	#FFFFFF	#000000	##FFFFFF
##1B3776	1.00	11.32	1.85	11.32
#FFFFFF	11.32	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F3F78

Deuteranopia (green-blind)

#003675

Tritanopia (blue-blind)

#004651

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b3776;
/* rgb */ color: rgb(27, 55, 118);
/* oklch */ color: oklch(35.4% 0.113 263.6);

Tailwind

colors: {
  custom: {
    50: '#656d9e',
    500: '#1b3776',
    950: '#000000',
  },
}

SCSS

$custom: #1b3776;
$custom-light: #656d9e;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3776",
  "rgb": {
    "r": 27,
    "g": 55,
    "b": 118
  },
  "hsl": {
    "h": 221.538,
    "s": 62.759,
    "l": 28.431
  },
  "oklch": {
    "l": 0.35435,
    "c": 0.11349,
    "h": 263.6
  },
  "luminance": 0.04273
}

Semantic roles & 50–950 ramp

primary

#1B3776

secondary

#AA8A42

accent

#B342E6

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #1B3776

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

Preview Lab → · Contrast checker → · Palette generator →