#1B355C#1B355C

#1B355C is a dark, moderate blue. Relative luminance 0.036; OKLCH L 33.0% C 0.076 H 258.3°. Best body text is #FFFFFF at 12.28:1 contrast (WCAG AA passes).

Color values

HEX	#1B355C
RGB	rgb(27, 53, 92)
HSL	hsl(216, 55%, 23%)
HSV	hsv(216, 71%, 36%)
CMYK	cmyk(70.7%, 42.4%, 0%, 63.9%)
CIE-LAB	lab(22.13, 4.43, -26.31)
CIE-LCH	lch(22.13, 26.68, 279.56°)
OKLab	oklab(32.99% -0.0154 -0.0749)
OKLCH	oklch(32.99% 0.076 258.3)
XYZ	xyz(3.6562, 3.5516, 10.6160)
Luminance	0.0355 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B355C #5C421B

analogous

#1B555C #1B355C #211B5C

triadic

#1B355C #5C1B35 #355C1B

tetradic

#1B355C #5C1B55 #5C421B #1B5C21

square

#1B355C #5C1B55 #5C421B #1B5C21

split-complementary

#1B355C #5C211B #555C1B

monochromatic

#070E18 #0D1A2D #1B355C #29508B #376CBB

Accessibility & contrast

On white

12.28

#1B355C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#1B355C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B355C

12.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B355C	#FFFFFF	#000000	##FFFFFF
##1B355C	1.00	12.28	1.71	12.28
#FFFFFF	12.28	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#23385E

Deuteranopia (green-blind)

#1A325B

Tritanopia (blue-blind)

#003E44

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1b355c;
/* rgb */ color: rgb(27, 53, 92);
/* oklch */ color: oklch(33.0% 0.076 258.3);

Tailwind

colors: {
  custom: {
    50: '#5f6b8a',
    500: '#1b355c',
    950: '#000000',
  },
}

SCSS

$custom: #1b355c;
$custom-light: #5f6b8a;
$custom-dark: #000000;

JSON

{
  "hex": "#1b355c",
  "rgb": {
    "r": 27,
    "g": 53,
    "b": 92
  },
  "hsl": {
    "h": 216,
    "s": 54.622,
    "l": 23.333
  },
  "oklch": {
    "l": 0.32993,
    "c": 0.07647,
    "h": 258.3
  },
  "luminance": 0.03552
}

Semantic roles & 50–950 ramp

primary

#1B355C

secondary

#927141

accent

#A34ADE

background

#F5F6F8

surface

#EAEBF0

border

#C6C6CB

text

#05060C

muted

#797A7D

Preview Lab

Preview with #1B355C

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

Preview Lab → · Contrast checker → · Palette generator →