#1B455A#1B455A

#1B455A is a dark, muted cyan. Relative luminance 0.052; OKLCH L 37.1% C 0.059 H 233.2°. Best body text is #FFFFFF at 10.27:1 contrast (WCAG AA passes).

Color values

HEX	#1B455A
RGB	rgb(27, 69, 90)
HSL	hsl(200, 54%, 23%)
HSV	hsv(200, 70%, 35%)
CMYK	cmyk(70%, 23.3%, 0%, 64.7%)
CIE-LAB	lab(27.37, -7.08, -16.78)
CIE-LCH	lch(27.37, 18.21, 247.13°)
OKLab	oklab(37.08% -0.0351 -0.047)
OKLCH	oklch(37.08% 0.059 233.2)
XYZ	xyz(4.4249, 5.2270, 10.4466)
Luminance	0.0523 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B455A #5A301B

analogous

#1B5A4F #1B455A #1B255A

triadic

#1B455A #5A1B45 #455A1B

tetradic

#1B455A #4F1B5A #5A301B #255A1B

square

#1B455A #4F1B5A #5A301B #255A1B

split-complementary

#1B455A #5A1B25 #5A4F1B

monochromatic

#071218 #0D212B #1B455A #296989 #378DB8

Accessibility & contrast

On white

10.27

#1B455A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#1B455A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B455A

10.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B455A	#FFFFFF	#000000	##FFFFFF
##1B455A	1.00	10.27	2.05	10.27
#FFFFFF	10.27	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B445B

Deuteranopia (green-blind)

#323E5A

Tritanopia (blue-blind)

#004B4C

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1b455a;
/* rgb */ color: rgb(27, 69, 90);
/* oklch */ color: oklch(37.1% 0.059 233.2);

Tailwind

colors: {
  custom: {
    50: '#5f7888',
    500: '#1b455a',
    950: '#000000',
  },
}

SCSS

$custom: #1b455a;
$custom-light: #5f7888;
$custom-dark: #000000;

JSON

{
  "hex": "#1b455a",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 90
  },
  "hsl": {
    "h": 200,
    "s": 53.846,
    "l": 22.941
  },
  "oklch": {
    "l": 0.37083,
    "c": 0.05869,
    "h": 233.2
  },
  "luminance": 0.05227
}

Semantic roles & 50–950 ramp

primary

#1B455A

secondary

#905B41

accent

#7B4BDD

background

#F5F7F8

surface

#EAEDF0

border

#C6C8CB

text

#05090B

muted

#797B7C

Preview Lab

Preview with #1B455A

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

Preview Lab → · Contrast checker → · Palette generator →