#1B3E88#1B3E88

#1B3E88 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.5% C 0.131 H 262.8°. Best body text is #FFFFFF at 10.04:1 contrast (WCAG AA passes).

Color values

HEX	#1B3E88
RGB	rgb(27, 62, 136)
HSL	hsl(221, 67%, 32%)
HSV	hsv(221, 80%, 53%)
CMYK	cmyk(80.1%, 54.4%, 0%, 46.7%)
CIE-LAB	lab(27.99, 16.06, -44.95)
CIE-LCH	lch(27.99, 47.73, 289.66°)
OKLab	oklab(38.48% -0.0164 -0.1295)
OKLCH	oklch(38.48% 0.131 262.8)
XYZ	xyz(6.6170, 5.4551, 23.9920)
Luminance	0.0546 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3E88 #88651B

analogous

#1B7588 #1B3E88 #2F1B88

triadic

#1B3E88 #881B3E #3E881B

tetradic

#1B3E88 #881B75 #88651B #1B882F

square

#1B3E88 #881B75 #88651B #1B882F

split-complementary

#1B3E88 #882F1B #75881B

monochromatic

#070F22 #112755 #1B3E88 #2555BB #4474DA

Accessibility & contrast

On white

10.04

#1B3E88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#1B3E88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3E88

10.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3E88	#FFFFFF	#000000	##FFFFFF
##1B3E88	1.00	10.04	2.09	10.04
#FFFFFF	10.04	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#06478B

Deuteranopia (green-blind)

#003D87

Tritanopia (blue-blind)

#00505C

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b3e88;
/* rgb */ color: rgb(27, 62, 136);
/* oklch */ color: oklch(38.5% 0.131 262.8);

Tailwind

colors: {
  custom: {
    50: '#6a72ab',
    500: '#1b3e88',
    950: '#000000',
  },
}

SCSS

$custom: #1b3e88;
$custom-light: #6a72ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3e88",
  "rgb": {
    "r": 27,
    "g": 62,
    "b": 136
  },
  "hsl": {
    "h": 220.734,
    "s": 66.871,
    "l": 31.961
  },
  "oklch": {
    "l": 0.38484,
    "c": 0.13055,
    "h": 262.8
  },
  "luminance": 0.05456
}

Semantic roles & 50–950 ramp

primary

#1B3E88

secondary

#BB9544

accent

#B33EEA

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B3E88

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

Preview Lab → · Contrast checker → · Palette generator →