#1B3687#1B3687

#1B3687 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.7% C 0.140 H 265.7°. Best body text is #FFFFFF at 10.91:1 contrast (WCAG AA passes).

Color values

HEX	#1B3687
RGB	rgb(27, 54, 135)
HSL	hsl(225, 67%, 32%)
HSV	hsv(225, 80%, 53%)
CMYK	cmyk(80%, 60%, 0%, 47.1%)
CIE-LAB	lab(25.62, 21.24, -48.18)
CIE-LCH	lch(25.62, 52.65, 293.79°)
OKLab	oklab(36.67% -0.0105 -0.1392)
OKLCH	oklch(36.67% 0.14 265.7)
XYZ	xyz(6.1428, 4.6199, 23.4850)
Luminance	0.0462 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3687 #876C1B

analogous

#1B6C87 #1B3687 #361B87

triadic

#1B3687 #871B36 #36871B

tetradic

#1B3687 #871B6C #876C1B #1B8736

square

#1B3687 #871B6C #876C1B #1B8736

split-complementary

#1B3687 #87361B #6C871B

monochromatic

#070D21 #112254 #1B3687 #254ABA #4369D9

Accessibility & contrast

On white

10.91

#1B3687 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#1B3687 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3687

10.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3687	#FFFFFF	#000000	##FFFFFF
##1B3687	1.00	10.91	1.92	10.91
#FFFFFF	10.91	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00428A

Deuteranopia (green-blind)

#003885

Tritanopia (blue-blind)

#004A59

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b3687;
/* rgb */ color: rgb(27, 54, 135);
/* oklch */ color: oklch(36.7% 0.140 265.7);

Tailwind

colors: {
  custom: {
    50: '#6a6cab',
    500: '#1b3687',
    950: '#000000',
  },
}

SCSS

$custom: #1b3687;
$custom-light: #6a6cab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3687",
  "rgb": {
    "r": 27,
    "g": 54,
    "b": 135
  },
  "hsl": {
    "h": 225,
    "s": 66.667,
    "l": 31.765
  },
  "oklch": {
    "l": 0.3667,
    "c": 0.13955,
    "h": 265.7
  },
  "luminance": 0.04621
}

Semantic roles & 50–950 ramp

primary

#1B3687

secondary

#BA9D44

accent

#BF3EEA

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1B3687

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

Preview Lab → · Contrast checker → · Palette generator →