#1B4589#1B4589

#1B4589 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.1% C 0.123 H 259.7°. Best body text is #FFFFFF at 9.30:1 contrast (WCAG AA passes).

Color values

HEX	#1B4589
RGB	rgb(27, 69, 137)
HSL	hsl(217, 67%, 32%)
HSV	hsv(217, 80%, 54%)
CMYK	cmyk(80.3%, 49.6%, 0%, 46.3%)
CIE-LAB	lab(30.14, 11.62, -42.09)
CIE-LCH	lch(30.14, 43.67, 285.43°)
OKLab	oklab(40.15% -0.0219 -0.121)
OKLCH	oklch(40.15% 0.123 259.7)
XYZ	xyz(7.0938, 6.2946, 24.5032)
Luminance	0.0630 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4589 #895F1B

analogous

#1B7C89 #1B4589 #281B89

triadic

#1B4589 #891B45 #45891B

tetradic

#1B4589 #891B7C #895F1B #1B8928

square

#1B4589 #891B7C #895F1B #1B8928

split-complementary

#1B4589 #89281B #7C891B

monochromatic

#071223 #112B56 #1B4589 #255FBC #447DDA

Accessibility & contrast

On white

9.30

#1B4589 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#1B4589 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4589

9.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4589	#FFFFFF	#000000	##FFFFFF
##1B4589	1.00	9.30	2.26	9.30
#FFFFFF	9.30	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E4C8C

Deuteranopia (green-blind)

#004288

Tritanopia (blue-blind)

#005560

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1b4589;
/* rgb */ color: rgb(27, 69, 137);
/* oklch */ color: oklch(40.1% 0.123 259.7);

Tailwind

colors: {
  custom: {
    50: '#6a78ac',
    500: '#1b4589',
    950: '#000000',
  },
}

SCSS

$custom: #1b4589;
$custom-light: #6a78ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4589",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 137
  },
  "hsl": {
    "h": 217.091,
    "s": 67.073,
    "l": 32.157
  },
  "oklch": {
    "l": 0.40149,
    "c": 0.12295,
    "h": 259.7
  },
  "luminance": 0.06295
}

Semantic roles & 50–950 ramp

primary

#1B4589

secondary

#BC8E44

accent

#A83EEA

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B4589

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

Preview Lab → · Contrast checker → · Palette generator →