#1B369D#1B369D

#1B369D is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.7% C 0.170 H 266.5°. Best body text is #FFFFFF at 10.19:1 contrast (WCAG AA passes).

Color values

HEX	#1B369D
RGB	rgb(27, 54, 157)
HSL	hsl(228, 71%, 36%)
HSV	hsv(228, 83%, 62%)
CMYK	cmyk(82.8%, 65.6%, 0%, 38.4%)
CIE-LAB	lab(27.59, 29.92, -58.52)
CIE-LCH	lch(27.59, 65.72, 297.08°)
OKLab	oklab(38.73% -0.0104 -0.1694)
OKLCH	oklch(38.73% 0.17 266.5)
XYZ	xyz(7.8548, 5.3047, 32.5017)
Luminance	0.0531 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B369D #9D821B

analogous

#1B779D #1B369D #411B9D

triadic

#1B369D #9D1B36 #369D1B

tetradic

#1B369D #9D1B77 #9D821B #1B9D41

square

#1B369D #9D1B77 #9D821B #1B9D41

split-complementary

#1B369D #9D411B #779D1B

monochromatic

#091235 #122469 #1B369D #2448D1 #516FE1

Accessibility & contrast

On white

10.19

#1B369D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#1B369D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B369D

10.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B369D	#FFFFFF	#000000	##FFFFFF
##1B369D	1.00	10.19	2.06	10.19
#FFFFFF	10.19	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0047A0

Deuteranopia (green-blind)

#003B9B

Tritanopia (blue-blind)

#005164

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1b369d;
/* rgb */ color: rgb(27, 54, 157);
/* oklch */ color: oklch(38.7% 0.170 266.5);

Tailwind

colors: {
  custom: {
    50: '#706cbb',
    500: '#1b369d',
    950: '#000000',
  },
}

SCSS

$custom: #1b369d;
$custom-light: #706cbb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b369d",
  "rgb": {
    "r": 27,
    "g": 54,
    "b": 157
  },
  "hsl": {
    "h": 227.538,
    "s": 70.652,
    "l": 36.078
  },
  "oklch": {
    "l": 0.38733,
    "c": 0.16977,
    "h": 266.5
  },
  "luminance": 0.05306
}

Semantic roles & 50–950 ramp

primary

#1B369D

secondary

#C4AC50

accent

#C83AED

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1B369D

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

Preview Lab → · Contrast checker → · Palette generator →