#1B355D#1B355D

#1B355D is a dark, moderate blue. Relative luminance 0.036; OKLCH L 33.1% C 0.078 H 258.8°. Best body text is #FFFFFF at 12.25:1 contrast (WCAG AA passes).

Color values

HEX	#1B355D
RGB	rgb(27, 53, 93)
HSL	hsl(216, 55%, 24%)
HSV	hsv(216, 71%, 36%)
CMYK	cmyk(71%, 43%, 0%, 63.5%)
CIE-LAB	lab(22.19, 4.84, -26.87)
CIE-LCH	lch(22.19, 27.30, 280.20°)
OKLab	oklab(33.06% -0.0152 -0.0765)
OKLCH	oklch(33.06% 0.078 258.8)
XYZ	xyz(3.7002, 3.5692, 10.8477)
Luminance	0.0357 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B355D #5D431B

analogous

#1B565D #1B355D #221B5D

triadic

#1B355D #5D1B35 #355D1B

tetradic

#1B355D #5D1B56 #5D431B #1B5D22

square

#1B355D #5D1B56 #5D431B #1B5D22

split-complementary

#1B355D #5D221B #565D1B

monochromatic

#070E18 #0D1A2E #1B355D #29508C #376BBC

Accessibility & contrast

On white

12.25

#1B355D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#1B355D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B355D

12.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B355D	#FFFFFF	#000000	##FFFFFF
##1B355D	1.00	12.25	1.71	12.25
#FFFFFF	12.25	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#23385F

Deuteranopia (green-blind)

#19325C

Tritanopia (blue-blind)

#003E44

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1b355d;
/* rgb */ color: rgb(27, 53, 93);
/* oklch */ color: oklch(33.1% 0.078 258.8);

Tailwind

colors: {
  custom: {
    50: '#606b8b',
    500: '#1b355d',
    950: '#000000',
  },
}

SCSS

$custom: #1b355d;
$custom-light: #606b8b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b355d",
  "rgb": {
    "r": 27,
    "g": 53,
    "b": 93
  },
  "hsl": {
    "h": 216.364,
    "s": 55,
    "l": 23.529
  },
  "oklch": {
    "l": 0.33063,
    "c": 0.07802,
    "h": 258.8
  },
  "luminance": 0.0357
}

Semantic roles & 50–950 ramp

primary

#1B355D

secondary

#937341

accent

#A449DE

background

#F5F6F8

surface

#EAEBF0

border

#C6C6CB

text

#05060C

muted

#797A7D

Preview Lab

Preview with #1B355D

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

Preview Lab → · Contrast checker → · Palette generator →