#1B424B#1B424B

#1B424B is a dark, muted cyan. Relative luminance 0.046; OKLCH L 35.5% C 0.046 H 215.1°. Best body text is #FFFFFF at 10.90:1 contrast (WCAG AA passes).

Color values

HEX	#1B424B
RGB	rgb(27, 66, 75)
HSL	hsl(191, 47%, 20%)
HSV	hsv(191, 64%, 29%)
CMYK	cmyk(64%, 12%, 0%, 70.6%)
CIE-LAB	lab(25.67, -10.64, -9.61)
CIE-LCH	lch(25.67, 14.34, 222.08°)
OKLab	oklab(35.51% -0.038 -0.0266)
OKLCH	oklch(35.51% 0.046 215.1)
XYZ	xyz(3.6697, 4.6371, 7.3569)
Luminance	0.0464 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B424B #4B241B

analogous

#1B4B3C #1B424B #1B2A4B

triadic

#1B424B #4B1B42 #424B1B

tetradic

#1B424B #3C1B4B #4B241B #2A4B1B

square

#1B424B #3C1B4B #4B241B #2A4B1B

split-complementary

#1B424B #4B1B2A #4B3C1B

monochromatic

#081417 #0B1A1E #1B424B #2B6A78 #3B91A5

Accessibility & contrast

On white

10.90

#1B424B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1B424B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B424B

10.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B424B	#FFFFFF	#000000	##FFFFFF
##1B424B	1.00	10.90	1.93	10.90
#FFFFFF	10.90	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C404C

Deuteranopia (green-blind)

#343B4B

Tritanopia (blue-blind)

#004545

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b424b;
/* rgb */ color: rgb(27, 66, 75);
/* oklch */ color: oklch(35.5% 0.046 215.1);

Tailwind

colors: {
  custom: {
    50: '#5d767d',
    500: '#1b424b',
    950: '#000000',
  },
}

SCSS

$custom: #1b424b;
$custom-light: #5d767d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b424b",
  "rgb": {
    "r": 27,
    "g": 66,
    "b": 75
  },
  "hsl": {
    "h": 191.25,
    "s": 47.059,
    "l": 20
  },
  "oklch": {
    "l": 0.35508,
    "c": 0.04637,
    "h": 215.1
  },
  "luminance": 0.04637
}

Semantic roles & 50–950 ramp

primary

#1B424B

secondary

#814D41

accent

#6A51D7

background

#F5F7F7

surface

#E9EDEE

border

#C5C8C9

text

#040809

muted

#797B7B

Preview Lab

Preview with #1B424B

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

Preview Lab → · Contrast checker → · Palette generator →