#1B3E85#1B3E85

#1B3E85 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.2% C 0.126 H 262.4°. Best body text is #FFFFFF at 10.12:1 contrast (WCAG AA passes).

Color values

HEX	#1B3E85
RGB	rgb(27, 62, 133)
HSL	hsl(220, 66%, 31%)
HSV	hsv(220, 80%, 52%)
CMYK	cmyk(79.7%, 53.4%, 0%, 47.8%)
CIE-LAB	lab(27.77, 14.84, -43.45)
CIE-LCH	lch(27.77, 45.92, 288.85°)
OKLab	oklab(38.24% -0.0167 -0.1251)
OKLCH	oklch(38.24% 0.126 262.4)
XYZ	xyz(6.4067, 5.3710, 22.8848)
Luminance	0.0537 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3E85 #85621B

analogous

#1B7385 #1B3E85 #2D1B85

triadic

#1B3E85 #851B3E #3E851B

tetradic

#1B3E85 #851B73 #85621B #1B852D

square

#1B3E85 #851B73 #85621B #1B852D

split-complementary

#1B3E85 #852D1B #73851B

monochromatic

#060F1F #112652 #1B3E85 #2556B8 #4274D9

Accessibility & contrast

On white

10.12

#1B3E85 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#1B3E85 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3E85

10.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3E85	#FFFFFF	#000000	##FFFFFF
##1B3E85	1.00	10.12	2.07	10.12
#FFFFFF	10.12	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E4788

Deuteranopia (green-blind)

#003D84

Tritanopia (blue-blind)

#004F5B

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b3e85;
/* rgb */ color: rgb(27, 62, 133);
/* oklch */ color: oklch(38.2% 0.126 262.4);

Tailwind

colors: {
  custom: {
    50: '#6972a9',
    500: '#1b3e85',
    950: '#000000',
  },
}

SCSS

$custom: #1b3e85;
$custom-light: #6972a9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3e85",
  "rgb": {
    "r": 27,
    "g": 62,
    "b": 133
  },
  "hsl": {
    "h": 220.189,
    "s": 66.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.38239,
    "c": 0.12623,
    "h": 262.4
  },
  "luminance": 0.05372
}

Semantic roles & 50–950 ramp

primary

#1B3E85

secondary

#B89244

accent

#B13FE9

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B3E85

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

Preview Lab → · Contrast checker → · Palette generator →