#1B4185#1B4185

#1B4185 is a dark, vivid blue. Relative luminance 0.057; OKLCH L 38.9% C 0.122 H 261.0°. Best body text is #FFFFFF at 9.81:1 contrast (WCAG AA passes).

Color values

HEX	#1B4185
RGB	rgb(27, 65, 133)
HSL	hsl(218, 66%, 31%)
HSV	hsv(218, 80%, 52%)
CMYK	cmyk(79.7%, 51.1%, 0%, 47.8%)
CIE-LAB	lab(28.66, 12.75, -42.01)
CIE-LCH	lch(28.66, 43.90, 286.88°)
OKLab	oklab(38.92% -0.0192 -0.1208)
OKLCH	oklch(38.92% 0.122 261)
XYZ	xyz(6.5744, 5.7063, 22.9407)
Luminance	0.0571 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4185 #855F1B

analogous

#1B7685 #1B4185 #2A1B85

triadic

#1B4185 #851B41 #41851B

tetradic

#1B4185 #851B76 #855F1B #1B852A

square

#1B4185 #851B76 #855F1B #1B852A

split-complementary

#1B4185 #852A1B #76851B

monochromatic

#060F1F #112852 #1B4185 #255AB8 #4278D9

Accessibility & contrast

On white

9.81

#1B4185 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#1B4185 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4185

9.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4185	#FFFFFF	#000000	##FFFFFF
##1B4185	1.00	9.81	2.14	9.81
#FFFFFF	9.81	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#184987

Deuteranopia (green-blind)

#003F84

Tritanopia (blue-blind)

#00515C

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1b4185;
/* rgb */ color: rgb(27, 65, 133);
/* oklch */ color: oklch(38.9% 0.122 261.0);

Tailwind

colors: {
  custom: {
    50: '#6975a9',
    500: '#1b4185',
    950: '#000000',
  },
}

SCSS

$custom: #1b4185;
$custom-light: #6975a9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4185",
  "rgb": {
    "r": 27,
    "g": 65,
    "b": 133
  },
  "hsl": {
    "h": 218.491,
    "s": 66.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.3892,
    "c": 0.12233,
    "h": 261
  },
  "luminance": 0.05707
}

Semantic roles & 50–950 ramp

primary

#1B4185

secondary

#B88E44

accent

#AC3FE9

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B4185

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

Preview Lab → · Contrast checker → · Palette generator →