#1B3D5D#1B3D5D

#1B3D5D is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.1% C 0.069 H 249.1°. Best body text is #FFFFFF at 11.22:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D5D
RGB	rgb(27, 61, 93)
HSL	hsl(209, 55%, 24%)
HSV	hsv(209, 71%, 36%)
CMYK	cmyk(71%, 34.4%, 0%, 63.5%)
CIE-LAB	lab(24.83, -0.69, -22.70)
CIE-LCH	lch(24.83, 22.71, 268.26°)
OKLab	oklab(35.12% -0.0245 -0.0642)
OKLCH	oklch(35.12% 0.069 249.1)
XYZ	xyz(4.0958, 4.3604, 10.9796)
Luminance	0.0436 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D5D #5D3B1B

analogous

#1B5D5C #1B3D5D #1B1C5D

triadic

#1B3D5D #5D1B3D #3D5D1B

tetradic

#1B3D5D #5C1B5D #5D3B1B #1C5D1B

square

#1B3D5D #5C1B5D #5D3B1B #1C5D1B

split-complementary

#1B3D5D #5D1B1C #5D5C1B

monochromatic

#071018 #0D1E2E #1B3D5D #295C8C #377BBC

Accessibility & contrast

On white

11.22

#1B3D5D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#1B3D5D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D5D

11.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D5D	#FFFFFF	#000000	##FFFFFF
##1B3D5D	1.00	11.22	1.87	11.22
#FFFFFF	11.22	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F3E5E

Deuteranopia (green-blind)

#26385C

Tritanopia (blue-blind)

#004548

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b3d5d;
/* rgb */ color: rgb(27, 61, 93);
/* oklch */ color: oklch(35.1% 0.069 249.1);

Tailwind

colors: {
  custom: {
    50: '#60728b',
    500: '#1b3d5d',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d5d;
$custom-light: #60728b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d5d",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 93
  },
  "hsl": {
    "h": 209.091,
    "s": 55,
    "l": 23.529
  },
  "oklch": {
    "l": 0.35121,
    "c": 0.06871,
    "h": 249.1
  },
  "luminance": 0.04361
}

Semantic roles & 50–950 ramp

primary

#1B3D5D

secondary

#936941

accent

#9249DE

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #1B3D5D

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

Preview Lab → · Contrast checker → · Palette generator →