#1B3E83#1B3E83

#1B3E83 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.1% C 0.123 H 262.1°. Best body text is #FFFFFF at 10.18:1 contrast (WCAG AA passes).

Color values

HEX	#1B3E83
RGB	rgb(27, 62, 131)
HSL	hsl(220, 66%, 31%)
HSV	hsv(220, 79%, 51%)
CMYK	cmyk(79.4%, 52.7%, 0%, 48.6%)
CIE-LAB	lab(27.62, 14.02, -42.45)
CIE-LCH	lch(27.62, 44.70, 288.28°)
OKLab	oklab(38.08% -0.017 -0.1222)
OKLCH	oklch(38.08% 0.123 262.1)
XYZ	xyz(6.2699, 5.3162, 22.1640)
Luminance	0.0532 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3E83 #83601B

analogous

#1B7283 #1B3E83 #2C1B83

triadic

#1B3E83 #831B3E #3E831B

tetradic

#1B3E83 #831B72 #83601B #1B832C

square

#1B3E83 #831B72 #83601B #1B832C

split-complementary

#1B3E83 #832C1B #72831B

monochromatic

#060E1E #112650 #1B3E83 #2556B6 #4173D8

Accessibility & contrast

On white

10.18

#1B3E83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#1B3E83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3E83

10.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3E83	#FFFFFF	#000000	##FFFFFF
##1B3E83	1.00	10.18	2.06	10.18
#FFFFFF	10.18	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#124685

Deuteranopia (green-blind)

#003D82

Tritanopia (blue-blind)

#004F5A

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1b3e83;
/* rgb */ color: rgb(27, 62, 131);
/* oklch */ color: oklch(38.1% 0.123 262.1);

Tailwind

colors: {
  custom: {
    50: '#6872a8',
    500: '#1b3e83',
    950: '#000000',
  },
}

SCSS

$custom: #1b3e83;
$custom-light: #6872a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3e83",
  "rgb": {
    "r": 27,
    "g": 62,
    "b": 131
  },
  "hsl": {
    "h": 219.808,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.38078,
    "c": 0.12333,
    "h": 262.1
  },
  "luminance": 0.05317
}

Semantic roles & 50–950 ramp

primary

#1B3E83

secondary

#B69043

accent

#B03FE9

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1B3E83

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

Preview Lab → · Contrast checker → · Palette generator →