#1B3D5E#1B3D5E

#1B3D5E is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.2% C 0.070 H 249.9°. Best body text is #FFFFFF at 11.20:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D5E
RGB	rgb(27, 61, 94)
HSL	hsl(210, 55%, 24%)
HSV	hsv(210, 71%, 37%)
CMYK	cmyk(71.3%, 35.1%, 0%, 63.1%)
CIE-LAB	lab(24.88, -0.30, -23.26)
CIE-LCH	lch(24.88, 23.26, 269.27°)
OKLab	oklab(35.18% -0.0241 -0.0659)
OKLCH	oklch(35.18% 0.07 249.9)
XYZ	xyz(4.1404, 4.3782, 11.2144)
Luminance	0.0438 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D5E #5E3C1B

analogous

#1B5E5D #1B3D5E #1B1B5E

triadic

#1B3D5E #5E1B3D #3D5E1B

tetradic

#1B3D5E #5D1B5E #5E3C1B #1B5E1B

square

#1B3D5E #5D1B5E #5E3C1B #1B5E1B

split-complementary

#1B3D5E #5E1B1B #5E5D1B

monochromatic

#070F18 #0D1E2E #1B3D5E #295C8E #367BBD

Accessibility & contrast

On white

11.20

#1B3D5E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#1B3D5E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D5E

11.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D5E	#FFFFFF	#000000	##FFFFFF
##1B3D5E	1.00	11.20	1.88	11.20
#FFFFFF	11.20	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E3F5F

Deuteranopia (green-blind)

#25385D

Tritanopia (blue-blind)

#004549

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b3d5e;
/* rgb */ color: rgb(27, 61, 94);
/* oklch */ color: oklch(35.2% 0.070 249.9);

Tailwind

colors: {
  custom: {
    50: '#60728c',
    500: '#1b3d5e',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d5e;
$custom-light: #60728c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d5e",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 94
  },
  "hsl": {
    "h": 209.552,
    "s": 55.372,
    "l": 23.725
  },
  "oklch": {
    "l": 0.35183,
    "c": 0.07014,
    "h": 249.9
  },
  "luminance": 0.04379
}

Semantic roles & 50–950 ramp

primary

#1B3D5E

secondary

#946A41

accent

#9349DF

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #1B3D5E

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

Preview Lab → · Contrast checker → · Palette generator →