#1B3D5F#1B3D5F

#1B3D5F is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.2% C 0.072 H 250.6°. Best body text is #FFFFFF at 11.17:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D5F
RGB	rgb(27, 61, 95)
HSL	hsl(210, 56%, 24%)
HSV	hsv(210, 72%, 37%)
CMYK	cmyk(71.6%, 35.8%, 0%, 62.7%)
CIE-LAB	lab(24.94, 0.10, -23.82)
CIE-LCH	lch(24.94, 23.82, 270.24°)
OKLab	oklab(35.25% -0.0238 -0.0675)
OKLCH	oklch(35.25% 0.072 250.6)
XYZ	xyz(4.1855, 4.3963, 11.4522)
Luminance	0.0440 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D5F #5F3D1B

analogous

#1B5F5F #1B3D5F #1B1B5F

triadic

#1B3D5F #5F1B3D #3D5F1B

tetradic

#1B3D5F #5F1B5F #5F3D1B #1B5F1B

square

#1B3D5F #5F1B5F #5F3D1B #1B5F1B

split-complementary

#1B3D5F #5F1B1B #5F5F1B

monochromatic

#070F18 #0D1E2F #1B3D5F #295C8F #367ABE

Accessibility & contrast

On white

11.17

#1B3D5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#1B3D5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D5F

11.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D5F	#FFFFFF	#000000	##FFFFFF
##1B3D5F	1.00	11.17	1.88	11.17
#FFFFFF	11.17	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E3F60

Deuteranopia (green-blind)

#25385E

Tritanopia (blue-blind)

#004549

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b3d5f;
/* rgb */ color: rgb(27, 61, 95);
/* oklch */ color: oklch(35.2% 0.072 250.6);

Tailwind

colors: {
  custom: {
    50: '#60728c',
    500: '#1b3d5f',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d5f;
$custom-light: #60728c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d5f",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 95
  },
  "hsl": {
    "h": 210,
    "s": 55.738,
    "l": 23.922
  },
  "oklch": {
    "l": 0.35246,
    "c": 0.07157,
    "h": 250.6
  },
  "luminance": 0.04397
}

Semantic roles & 50–950 ramp

primary

#1B3D5F

secondary

#956B41

accent

#9449DF

background

#F5F6F8

surface

#EAECF0

border

#C6C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #1B3D5F

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

Preview Lab → · Contrast checker → · Palette generator →