#1B3E8A#1B3E8A

#1B3E8A is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.6% C 0.133 H 263.0°. Best body text is #FFFFFF at 9.99:1 contrast (WCAG AA passes).

Color values

HEX	#1B3E8A
RGB	rgb(27, 62, 138)
HSL	hsl(221, 67%, 32%)
HSV	hsv(221, 80%, 54%)
CMYK	cmyk(80.4%, 55.1%, 0%, 45.9%)
CIE-LAB	lab(28.15, 16.87, -45.94)
CIE-LCH	lch(28.15, 48.94, 290.17°)
OKLab	oklab(38.65% -0.0162 -0.1324)
OKLCH	oklch(38.65% 0.133 263)
XYZ	xyz(6.7604, 5.5125, 24.7475)
Luminance	0.0551 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3E8A #8A671B

analogous

#1B768A #1B3E8A #2F1B8A

triadic

#1B3E8A #8A1B3E #3E8A1B

tetradic

#1B3E8A #8A1B76 #8A671B #1B8A2F

square

#1B3E8A #8A1B76 #8A671B #1B8A2F

split-complementary

#1B3E8A #8A2F1B #768A1B

monochromatic

#071024 #112757 #1B3E8A #2555BD #4574DB

Accessibility & contrast

On white

9.99

#1B3E8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#1B3E8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3E8A

9.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3E8A	#FFFFFF	#000000	##FFFFFF
##1B3E8A	1.00	9.99	2.10	9.99
#FFFFFF	9.99	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	9.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#01488D

Deuteranopia (green-blind)

#003E89

Tritanopia (blue-blind)

#00515D

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b3e8a;
/* rgb */ color: rgb(27, 62, 138);
/* oklch */ color: oklch(38.6% 0.133 263.0);

Tailwind

colors: {
  custom: {
    50: '#6a72ad',
    500: '#1b3e8a',
    950: '#000000',
  },
}

SCSS

$custom: #1b3e8a;
$custom-light: #6a72ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3e8a",
  "rgb": {
    "r": 27,
    "g": 62,
    "b": 138
  },
  "hsl": {
    "h": 221.081,
    "s": 67.273,
    "l": 32.353
  },
  "oklch": {
    "l": 0.38649,
    "c": 0.13341,
    "h": 263
  },
  "luminance": 0.05513
}

Semantic roles & 50–950 ramp

primary

#1B3E8A

secondary

#BC9645

accent

#B43EEA

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1B3E8A

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

Preview Lab → · Contrast checker → · Palette generator →