#1B454F#1B454F

#1B454F is a dark, muted cyan. Relative luminance 0.051; OKLCH L 36.5% C 0.049 H 215.8°. Best body text is #FFFFFF at 10.44:1 contrast (WCAG AA passes).

Color values

HEX	#1B454F
RGB	rgb(27, 69, 79)
HSL	hsl(192, 49%, 21%)
HSV	hsv(192, 66%, 31%)
CMYK	cmyk(65.8%, 12.7%, 0%, 69%)
CIE-LAB	lab(26.89, -11.07, -10.38)
CIE-LCH	lch(26.89, 15.18, 223.16°)
OKLab	oklab(36.53% -0.0399 -0.0288)
OKLCH	oklch(36.53% 0.049 215.8)
XYZ	xyz(3.9908, 5.0534, 8.1607)
Luminance	0.0505 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B454F #4F251B

analogous

#1B4F3F #1B454F #1B2B4F

triadic

#1B454F #4F1B45 #454F1B

tetradic

#1B454F #3F1B4F #4F251B #2B4F1B

square

#1B454F #3F1B4F #4F251B #2B4F1B

split-complementary

#1B454F #4F1B2B #4F3F1B

monochromatic

#081417 #0B1D21 #1B454F #2B6D7D #3A95AA

Accessibility & contrast

On white

10.44

#1B454F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1B454F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B454F

10.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B454F	#FFFFFF	#000000	##FFFFFF
##1B454F	1.00	10.44	2.01	10.44
#FFFFFF	10.44	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E4350

Deuteranopia (green-blind)

#363D4F

Tritanopia (blue-blind)

#004948

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1b454f;
/* rgb */ color: rgb(27, 69, 79);
/* oklch */ color: oklch(36.5% 0.049 215.8);

Tailwind

colors: {
  custom: {
    50: '#5e7880',
    500: '#1b454f',
    950: '#000000',
  },
}

SCSS

$custom: #1b454f;
$custom-light: #5e7880;
$custom-dark: #000000;

JSON

{
  "hex": "#1b454f",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 79
  },
  "hsl": {
    "h": 191.538,
    "s": 49.057,
    "l": 20.784
  },
  "oklch": {
    "l": 0.36534,
    "c": 0.04924,
    "h": 215.8
  },
  "luminance": 0.05054
}

Semantic roles & 50–950 ramp

primary

#1B454F

secondary

#854E41

accent

#6A4FD9

background

#F5F7F7

surface

#E9EDEE

border

#C5C8C9

text

#05090A

muted

#797B7C

Preview Lab

Preview with #1B454F

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

Preview Lab → · Contrast checker → · Palette generator →