#1B356D#1B356D

#1B356D is a dark, moderate blue. Relative luminance 0.039; OKLCH L 34.3% C 0.103 H 263.3°. Best body text is #FFFFFF at 11.82:1 contrast (WCAG AA passes).

Color values

HEX	#1B356D
RGB	rgb(27, 53, 109)
HSL	hsl(221, 60%, 27%)
HSV	hsv(221, 75%, 43%)
CMYK	cmyk(75.2%, 51.4%, 0%, 57.3%)
CIE-LAB	lab(23.28, 11.36, -35.52)
CIE-LCH	lch(23.28, 37.29, 287.74°)
OKLab	oklab(34.25% -0.012 -0.1019)
OKLCH	oklch(34.25% 0.103 263.3)
XYZ	xyz(4.4844, 3.8829, 14.9782)
Luminance	0.0388 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B356D #6D531B

analogous

#1B5E6D #1B356D #2A1B6D

triadic

#1B356D #6D1B35 #356D1B

tetradic

#1B356D #6D1B5E #6D531B #1B6D2A

square

#1B356D #6D1B5E #6D531B #1B6D2A

split-complementary

#1B356D #6D2A1B #5E6D1B

monochromatic

#060C19 #0F1D3C #1B356D #274D9E #3565CD

Accessibility & contrast

On white

11.82

#1B356D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#1B356D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B356D

11.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B356D	#FFFFFF	#000000	##FFFFFF
##1B356D	1.00	11.82	1.78	11.82
#FFFFFF	11.82	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#163B6F

Deuteranopia (green-blind)

#00346C

Tritanopia (blue-blind)

#00424B

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1b356d;
/* rgb */ color: rgb(27, 53, 109);
/* oklch */ color: oklch(34.3% 0.103 263.3);

Tailwind

colors: {
  custom: {
    50: '#636b97',
    500: '#1b356d',
    950: '#000000',
  },
}

SCSS

$custom: #1b356d;
$custom-light: #636b97;
$custom-dark: #000000;

JSON

{
  "hex": "#1b356d",
  "rgb": {
    "r": 27,
    "g": 53,
    "b": 109
  },
  "hsl": {
    "h": 220.976,
    "s": 60.294,
    "l": 26.667
  },
  "oklch": {
    "l": 0.34251,
    "c": 0.10265,
    "h": 263.3
  },
  "luminance": 0.03883
}

Semantic roles & 50–950 ramp

primary

#1B356D

secondary

#A28342

accent

#B144E3

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #1B356D

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

Preview Lab → · Contrast checker → · Palette generator →