#1B4187#1B4187

#1B4187 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.1% C 0.125 H 261.3°. Best body text is #FFFFFF at 9.76:1 contrast (WCAG AA passes).

Color values

HEX	#1B4187
RGB	rgb(27, 65, 135)
HSL	hsl(219, 67%, 32%)
HSV	hsv(219, 80%, 53%)
CMYK	cmyk(80%, 51.9%, 0%, 47.1%)
CIE-LAB	lab(28.80, 13.57, -43.02)
CIE-LCH	lch(28.80, 45.11, 287.50°)
OKLab	oklab(39.08% -0.0189 -0.1238)
OKLCH	oklch(39.08% 0.125 261.3)
XYZ	xyz(6.7139, 5.7621, 23.6753)
Luminance	0.0576 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4187 #87611B

analogous

#1B7787 #1B4187 #2B1B87

triadic

#1B4187 #871B41 #41871B

tetradic

#1B4187 #871B77 #87611B #1B872B

square

#1B4187 #871B77 #87611B #1B872B

split-complementary

#1B4187 #872B1B #77871B

monochromatic

#071021 #112854 #1B4187 #255ABA #4378D9

Accessibility & contrast

On white

9.76

#1B4187 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#1B4187 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4187

9.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4187	#FFFFFF	#000000	##FFFFFF
##1B4187	1.00	9.76	2.15	9.76
#FFFFFF	9.76	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#15498A

Deuteranopia (green-blind)

#003F86

Tritanopia (blue-blind)

#00525D

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1b4187;
/* rgb */ color: rgb(27, 65, 135);
/* oklch */ color: oklch(39.1% 0.125 261.3);

Tailwind

colors: {
  custom: {
    50: '#6975aa',
    500: '#1b4187',
    950: '#000000',
  },
}

SCSS

$custom: #1b4187;
$custom-light: #6975aa;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4187",
  "rgb": {
    "r": 27,
    "g": 65,
    "b": 135
  },
  "hsl": {
    "h": 218.889,
    "s": 66.667,
    "l": 31.765
  },
  "oklch": {
    "l": 0.39078,
    "c": 0.12522,
    "h": 261.3
  },
  "luminance": 0.05763
}

Semantic roles & 50–950 ramp

primary

#1B4187

secondary

#BA9044

accent

#AD3EEA

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B4187

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

Preview Lab → · Contrast checker → · Palette generator →