#1B368B#1B368B

#1B368B is a dark, vivid blue. Relative luminance 0.047; OKLCH L 37.0% C 0.145 H 265.9°. Best body text is #FFFFFF at 10.79:1 contrast (WCAG AA passes).

Color values

HEX	#1B368B
RGB	rgb(27, 54, 139)
HSL	hsl(226, 67%, 33%)
HSV	hsv(226, 81%, 55%)
CMYK	cmyk(80.6%, 61.2%, 0%, 45.5%)
CIE-LAB	lab(25.97, 22.85, -50.11)
CIE-LCH	lch(25.97, 55.07, 294.51°)
OKLab	oklab(37.03% -0.0103 -0.1448)
OKLCH	oklch(37.03% 0.145 265.9)
XYZ	xyz(6.4297, 4.7347, 24.9961)
Luminance	0.0474 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B368B #8B701B

analogous

#1B6E8B #1B368B #381B8B

triadic

#1B368B #8B1B36 #368B1B

tetradic

#1B368B #8B1B6E #8B701B #1B8B38

square

#1B368B #8B1B6E #8B701B #1B8B38

split-complementary

#1B368B #8B381B #6E8B1B

monochromatic

#070E25 #112258 #1B368B #254ABE #4569DB

Accessibility & contrast

On white

10.79

#1B368B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#1B368B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B368B

10.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B368B	#FFFFFF	#000000	##FFFFFF
##1B368B	1.00	10.79	1.95	10.79
#FFFFFF	10.79	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00438E

Deuteranopia (green-blind)

#003889

Tritanopia (blue-blind)

#004C5B

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b368b;
/* rgb */ color: rgb(27, 54, 139);
/* oklch */ color: oklch(37.0% 0.145 265.9);

Tailwind

colors: {
  custom: {
    50: '#6b6cae',
    500: '#1b368b',
    950: '#000000',
  },
}

SCSS

$custom: #1b368b;
$custom-light: #6b6cae;
$custom-dark: #000000;

JSON

{
  "hex": "#1b368b",
  "rgb": {
    "r": 27,
    "g": 54,
    "b": 139
  },
  "hsl": {
    "h": 225.536,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.37033,
    "c": 0.14519,
    "h": 265.9
  },
  "luminance": 0.04735
}

Semantic roles & 50–950 ramp

primary

#1B368B

secondary

#BCA045

accent

#C13DEA

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1B368B

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

Preview Lab → · Contrast checker → · Palette generator →