#1B4458#1B4458

#1B4458 is a dark, muted cyan. Relative luminance 0.051; OKLCH L 36.7% C 0.057 H 232.5°. Best body text is #FFFFFF at 10.42:1 contrast (WCAG AA passes).

Color values

HEX	#1B4458
RGB	rgb(27, 68, 88)
HSL	hsl(200, 53%, 23%)
HSV	hsv(200, 69%, 35%)
CMYK	cmyk(69.3%, 22.7%, 0%, 65.5%)
CIE-LAB	lab(26.94, -7.19, -16.16)
CIE-LCH	lch(26.94, 17.69, 246.01°)
OKLab	oklab(36.71% -0.0347 -0.0452)
OKLCH	oklch(36.71% 0.057 232.5)
XYZ	xyz(4.2799, 5.0714, 9.9840)
Luminance	0.0507 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4458 #582F1B

analogous

#1B584D #1B4458 #1B2658

triadic

#1B4458 #581B44 #44581B

tetradic

#1B4458 #4D1B58 #582F1B #26581B

square

#1B4458 #4D1B58 #582F1B #26581B

split-complementary

#1B4458 #581B26 #584D1B

monochromatic

#071217 #0D2029 #1B4458 #296887 #388CB6

Accessibility & contrast

On white

10.42

#1B4458 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1B4458 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4458

10.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4458	#FFFFFF	#000000	##FFFFFF
##1B4458	1.00	10.42	2.01	10.42
#FFFFFF	10.42	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A4359

Deuteranopia (green-blind)

#323D58

Tritanopia (blue-blind)

#00494B

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1b4458;
/* rgb */ color: rgb(27, 68, 88);
/* oklch */ color: oklch(36.7% 0.057 232.5);

Tailwind

colors: {
  custom: {
    50: '#5f7787',
    500: '#1b4458',
    950: '#000000',
  },
}

SCSS

$custom: #1b4458;
$custom-light: #5f7787;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4458",
  "rgb": {
    "r": 27,
    "g": 68,
    "b": 88
  },
  "hsl": {
    "h": 199.672,
    "s": 53.043,
    "l": 22.549
  },
  "oklch": {
    "l": 0.36706,
    "c": 0.05703,
    "h": 232.5
  },
  "luminance": 0.05072
}

Semantic roles & 50–950 ramp

primary

#1B4458

secondary

#8E5A41

accent

#7B4BDC

background

#F5F7F8

surface

#EAEDEF

border

#C6C8CA

text

#05080B

muted

#797B7C

Preview Lab

Preview with #1B4458

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

Preview Lab → · Contrast checker → · Palette generator →