#1B3889#1B3889

#1B3889 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.3% C 0.140 H 265.2°. Best body text is #FFFFFF at 10.64:1 contrast (WCAG AA passes).

Color values

HEX	#1B3889
RGB	rgb(27, 56, 137)
HSL	hsl(224, 67%, 32%)
HSV	hsv(224, 80%, 54%)
CMYK	cmyk(80.3%, 59.1%, 0%, 46.3%)
CIE-LAB	lab(26.35, 20.65, -48.24)
CIE-LCH	lch(26.35, 52.47, 293.18°)
OKLab	oklab(37.27% -0.0118 -0.1393)
OKLCH	oklch(37.27% 0.14 265.2)
XYZ	xyz(6.3799, 4.8668, 24.2652)
Luminance	0.0487 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3889 #896C1B

analogous

#1B6F89 #1B3889 #351B89

triadic

#1B3889 #891B38 #38891B

tetradic

#1B3889 #891B6F #896C1B #1B8935

square

#1B3889 #891B6F #896C1B #1B8935

split-complementary

#1B3889 #89351B #6F891B

monochromatic

#070E23 #112356 #1B3889 #254DBC #446CDA

Accessibility & contrast

On white

10.64

#1B3889 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#1B3889 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3889

10.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3889	#FFFFFF	#000000	##FFFFFF
##1B3889	1.00	10.64	1.97	10.64
#FFFFFF	10.64	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00448C

Deuteranopia (green-blind)

#003987

Tritanopia (blue-blind)

#004C5A

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1b3889;
/* rgb */ color: rgb(27, 56, 137);
/* oklch */ color: oklch(37.3% 0.140 265.2);

Tailwind

colors: {
  custom: {
    50: '#6a6eac',
    500: '#1b3889',
    950: '#000000',
  },
}

SCSS

$custom: #1b3889;
$custom-light: #6a6eac;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3889",
  "rgb": {
    "r": 27,
    "g": 56,
    "b": 137
  },
  "hsl": {
    "h": 224.182,
    "s": 67.073,
    "l": 32.157
  },
  "oklch": {
    "l": 0.37269,
    "c": 0.13979,
    "h": 265.2
  },
  "luminance": 0.04868
}

Semantic roles & 50–950 ramp

primary

#1B3889

secondary

#BC9C44

accent

#BD3EEA

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1B3889

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

Preview Lab → · Contrast checker → · Palette generator →