#1B356E#1B356E

#1B356E is a dark, moderate blue. Relative luminance 0.039; OKLCH L 34.3% C 0.104 H 263.5°. Best body text is #FFFFFF at 11.79:1 contrast (WCAG AA passes).

Color values

HEX	#1B356E
RGB	rgb(27, 53, 110)
HSL	hsl(221, 61%, 27%)
HSV	hsv(221, 75%, 43%)
CMYK	cmyk(75.5%, 51.8%, 0%, 56.9%)
CIE-LAB	lab(23.35, 11.77, -36.04)
CIE-LCH	lch(23.35, 37.92, 288.09°)
OKLab	oklab(34.33% -0.0119 -0.1035)
OKLCH	oklch(34.33% 0.104 263.5)
XYZ	xyz(4.5386, 3.9045, 15.2633)
Luminance	0.0391 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B356E #6E541B

analogous

#1B5F6E #1B356E #2B1B6E

triadic

#1B356E #6E1B35 #356E1B

tetradic

#1B356E #6E1B5F #6E541B #1B6E2B

square

#1B356E #6E1B5F #6E541B #1B6E2B

split-complementary

#1B356E #6E2B1B #5F6E1B

monochromatic

#060C19 #0F1D3D #1B356E #274D9F #3665CE

Accessibility & contrast

On white

11.79

#1B356E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#1B356E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B356E

11.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B356E	#FFFFFF	#000000	##FFFFFF
##1B356E	1.00	11.79	1.78	11.79
#FFFFFF	11.79	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#143C70

Deuteranopia (green-blind)

#00346D

Tritanopia (blue-blind)

#00424C

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1b356e;
/* rgb */ color: rgb(27, 53, 110);
/* oklch */ color: oklch(34.3% 0.104 263.5);

Tailwind

colors: {
  custom: {
    50: '#646b98',
    500: '#1b356e',
    950: '#000000',
  },
}

SCSS

$custom: #1b356e;
$custom-light: #646b98;
$custom-dark: #000000;

JSON

{
  "hex": "#1b356e",
  "rgb": {
    "r": 27,
    "g": 53,
    "b": 110
  },
  "hsl": {
    "h": 221.205,
    "s": 60.584,
    "l": 26.863
  },
  "oklch": {
    "l": 0.3433,
    "c": 0.10417,
    "h": 263.5
  },
  "luminance": 0.03905
}

Semantic roles & 50–950 ramp

primary

#1B356E

secondary

#A38542

accent

#B244E4

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1B356E

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

Preview Lab → · Contrast checker → · Palette generator →