#1B4584#1B4584

#1B4584 is a dark, moderate blue. Relative luminance 0.062; OKLCH L 39.8% C 0.116 H 258.6°. Best body text is #FFFFFF at 9.41:1 contrast (WCAG AA passes).

Color values

HEX	#1B4584
RGB	rgb(27, 69, 132)
HSL	hsl(216, 66%, 31%)
HSV	hsv(216, 80%, 52%)
CMYK	cmyk(79.5%, 47.7%, 0%, 48.2%)
CIE-LAB	lab(29.80, 9.58, -39.55)
CIE-LCH	lch(29.80, 40.70, 283.62°)
OKLab	oklab(39.77% -0.0228 -0.1135)
OKLCH	oklch(39.77% 0.116 258.6)
XYZ	xyz(6.7435, 6.1544, 22.6578)
Luminance	0.0616 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4584 #845A1B

analogous

#1B7984 #1B4584 #251B84

triadic

#1B4584 #841B45 #45841B

tetradic

#1B4584 #841B79 #845A1B #1B8425

square

#1B4584 #841B79 #845A1B #1B8425

split-complementary

#1B4584 #84251B #79841B

monochromatic

#06101E #112A51 #1B4584 #2560B7 #417ED8

Accessibility & contrast

On white

9.41

#1B4584 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#1B4584 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4584

9.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4584	#FFFFFF	#000000	##FFFFFF
##1B4584	1.00	9.41	2.23	9.41
#FFFFFF	9.41	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#234B86

Deuteranopia (green-blind)

#094283

Tritanopia (blue-blind)

#00545E

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1b4584;
/* rgb */ color: rgb(27, 69, 132);
/* oklch */ color: oklch(39.8% 0.116 258.6);

Tailwind

colors: {
  custom: {
    50: '#6878a8',
    500: '#1b4584',
    950: '#000000',
  },
}

SCSS

$custom: #1b4584;
$custom-light: #6878a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4584",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 132
  },
  "hsl": {
    "h": 216,
    "s": 66.038,
    "l": 31.176
  },
  "oklch": {
    "l": 0.39773,
    "c": 0.11577,
    "h": 258.6
  },
  "luminance": 0.06155
}

Semantic roles & 50–950 ramp

primary

#1B4584

secondary

#B78943

accent

#A53FE9

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B4584

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

Preview Lab → · Contrast checker → · Palette generator →