#1B455B#1B455B

#1B455B is a dark, muted cyan. Relative luminance 0.052; OKLCH L 37.1% C 0.060 H 234.5°. Best body text is #FFFFFF at 10.25:1 contrast (WCAG AA passes).

Color values

HEX	#1B455B
RGB	rgb(27, 69, 91)
HSL	hsl(201, 54%, 23%)
HSV	hsv(201, 70%, 36%)
CMYK	cmyk(70.3%, 24.2%, 0%, 64.3%)
CIE-LAB	lab(27.42, -6.70, -17.35)
CIE-LCH	lch(27.42, 18.60, 248.88°)
OKLab	oklab(37.14% -0.0347 -0.0487)
OKLCH	oklch(37.14% 0.06 234.5)
XYZ	xyz(4.4677, 5.2441, 10.6723)
Luminance	0.0524 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B455B #5B311B

analogous

#1B5B51 #1B455B #1B255B

triadic

#1B455B #5B1B45 #455B1B

tetradic

#1B455B #511B5B #5B311B #255B1B

square

#1B455B #511B5B #5B311B #255B1B

split-complementary

#1B455B #5B1B25 #5B511B

monochromatic

#071218 #0D212C #1B455B #29698A #378DB9

Accessibility & contrast

On white

10.25

#1B455B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#1B455B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B455B

10.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B455B	#FFFFFF	#000000	##FFFFFF
##1B455B	1.00	10.25	2.05	10.25
#FFFFFF	10.25	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A445C

Deuteranopia (green-blind)

#323E5B

Tritanopia (blue-blind)

#004B4C

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1b455b;
/* rgb */ color: rgb(27, 69, 91);
/* oklch */ color: oklch(37.1% 0.060 234.5);

Tailwind

colors: {
  custom: {
    50: '#607889',
    500: '#1b455b',
    950: '#000000',
  },
}

SCSS

$custom: #1b455b;
$custom-light: #607889;
$custom-dark: #000000;

JSON

{
  "hex": "#1b455b",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 91
  },
  "hsl": {
    "h": 200.625,
    "s": 54.237,
    "l": 23.137
  },
  "oklch": {
    "l": 0.37136,
    "c": 0.05978,
    "h": 234.5
  },
  "luminance": 0.05245
}

Semantic roles & 50–950 ramp

primary

#1B455B

secondary

#915C41

accent

#7D4ADE

background

#F5F7F8

surface

#EAEDF0

border

#C6C8CB

text

#05090B

muted

#797B7C

Preview Lab

Preview with #1B455B

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

Preview Lab → · Contrast checker → · Palette generator →