#1B3882#1B3882

#1B3882 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.7% C 0.130 H 264.6°. Best body text is #FFFFFF at 10.85:1 contrast (WCAG AA passes).

Color values

HEX	#1B3882
RGB	rgb(27, 56, 130)
HSL	hsl(223, 66%, 31%)
HSV	hsv(223, 79%, 51%)
CMYK	cmyk(79.2%, 56.9%, 0%, 49%)
CIE-LAB	lab(25.78, 17.82, -44.80)
CIE-LCH	lch(25.78, 48.21, 291.69°)
OKLab	oklab(36.66% -0.0122 -0.1292)
OKLCH	oklch(36.66% 0.13 264.6)
XYZ	xyz(5.8940, 4.6724, 21.7060)
Luminance	0.0467 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3882 #82651B

analogous

#1B6B82 #1B3882 #311B82

triadic

#1B3882 #821B38 #38821B

tetradic

#1B3882 #821B6B #82651B #1B8231

square

#1B3882 #821B6B #82651B #1B8231

split-complementary

#1B3882 #82311B #6B821B

monochromatic

#060C1D #10224F #1B3882 #264EB5 #406BD7

Accessibility & contrast

On white

10.85

#1B3882 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1B3882 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3882

10.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3882	#FFFFFF	#000000	##FFFFFF
##1B3882	1.00	10.85	1.93	10.85
#FFFFFF	10.85	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004285

Deuteranopia (green-blind)

#003981

Tritanopia (blue-blind)

#004A57

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b3882;
/* rgb */ color: rgb(27, 56, 130);
/* oklch */ color: oklch(36.7% 0.130 264.6);

Tailwind

colors: {
  custom: {
    50: '#686ea7',
    500: '#1b3882',
    950: '#000000',
  },
}

SCSS

$custom: #1b3882;
$custom-light: #686ea7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3882",
  "rgb": {
    "r": 27,
    "g": 56,
    "b": 130
  },
  "hsl": {
    "h": 223.107,
    "s": 65.605,
    "l": 30.784
  },
  "oklch": {
    "l": 0.36659,
    "c": 0.12977,
    "h": 264.6
  },
  "luminance": 0.04673
}

Semantic roles & 50–950 ramp

primary

#1B3882

secondary

#B69543

accent

#B93FE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1B3882

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

Preview Lab → · Contrast checker → · Palette generator →