#1B4587#1B4587

#1B4587 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.0% C 0.120 H 259.3°. Best body text is #FFFFFF at 9.34:1 contrast (WCAG AA passes).

Color values

HEX	#1B4587
RGB	rgb(27, 69, 135)
HSL	hsl(217, 67%, 32%)
HSV	hsv(217, 80%, 53%)
CMYK	cmyk(80%, 48.9%, 0%, 47.1%)
CIE-LAB	lab(30.00, 10.81, -41.08)
CIE-LCH	lch(30.00, 42.48, 284.74°)
OKLab	oklab(40% -0.0223 -0.118)
OKLCH	oklch(40% 0.12 259.3)
XYZ	xyz(6.9517, 6.2377, 23.7546)
Luminance	0.0624 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4587 #875D1B

analogous

#1B7B87 #1B4587 #271B87

triadic

#1B4587 #871B45 #45871B

tetradic

#1B4587 #871B7B #875D1B #1B8727

square

#1B4587 #871B7B #875D1B #1B8727

split-complementary

#1B4587 #87271B #7B871B

monochromatic

#071121 #112B54 #1B4587 #255FBA #437DD9

Accessibility & contrast

On white

9.34

#1B4587 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#1B4587 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4587

9.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4587	#FFFFFF	#000000	##FFFFFF
##1B4587	1.00	9.34	2.25	9.34
#FFFFFF	9.34	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#204C89

Deuteranopia (green-blind)

#004286

Tritanopia (blue-blind)

#00555F

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1b4587;
/* rgb */ color: rgb(27, 69, 135);
/* oklch */ color: oklch(40.0% 0.120 259.3);

Tailwind

colors: {
  custom: {
    50: '#6978aa',
    500: '#1b4587',
    950: '#000000',
  },
}

SCSS

$custom: #1b4587;
$custom-light: #6978aa;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4587",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 135
  },
  "hsl": {
    "h": 216.667,
    "s": 66.667,
    "l": 31.765
  },
  "oklch": {
    "l": 0.39998,
    "c": 0.12008,
    "h": 259.3
  },
  "luminance": 0.06239
}

Semantic roles & 50–950 ramp

primary

#1B4587

secondary

#BA8C44

accent

#A73EEA

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B4587

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

Preview Lab → · Contrast checker → · Palette generator →