#1B4B73#1B4B73

#1B4B73 is a dark, moderate cyan. Relative luminance 0.065; OKLCH L 40.1% C 0.085 H 247.2°. Best body text is #FFFFFF at 9.13:1 contrast (WCAG AA passes).

Color values

HEX	#1B4B73
RGB	rgb(27, 75, 115)
HSL	hsl(207, 62%, 28%)
HSV	hsv(207, 77%, 45%)
CMYK	cmyk(76.5%, 34.8%, 0%, 54.9%)
CIE-LAB	lab(30.65, -1.30, -27.59)
CIE-LCH	lch(30.65, 27.62, 267.31°)
OKLab	oklab(40.1% -0.0329 -0.0783)
OKLCH	oklch(40.1% 0.085 247.2)
XYZ	xyz(6.0614, 6.5023, 17.1519)
Luminance	0.0650 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4B73 #73431B

analogous

#1B736F #1B4B73 #1B1F73

triadic

#1B4B73 #731B4B #4B731B

tetradic

#1B4B73 #6F1B73 #73431B #1F731B

square

#1B4B73 #6F1B73 #73431B #1F731B

split-complementary

#1B4B73 #731B1F #736F1B

monochromatic

#061019 #0F2B41 #1B4B73 #276BA5 #388BD0

Accessibility & contrast

On white

9.13

#1B4B73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#1B4B73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4B73

9.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4B73	#FFFFFF	#000000	##FFFFFF
##1B4B73	1.00	9.13	2.30	9.13
#FFFFFF	9.13	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#394D75

Deuteranopia (green-blind)

#2C4472

Tritanopia (blue-blind)

#005559

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1b4b73;
/* rgb */ color: rgb(27, 75, 115);
/* oklch */ color: oklch(40.1% 0.085 247.2);

Tailwind

colors: {
  custom: {
    50: '#647d9b',
    500: '#1b4b73',
    950: '#000000',
  },
}

SCSS

$custom: #1b4b73;
$custom-light: #647d9b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4b73",
  "rgb": {
    "r": 27,
    "g": 75,
    "b": 115
  },
  "hsl": {
    "h": 207.273,
    "s": 61.972,
    "l": 27.843
  },
  "oklch": {
    "l": 0.40095,
    "c": 0.08491,
    "h": 247.2
  },
  "luminance": 0.06503
}

Semantic roles & 50–950 ramp

primary

#1B4B73

secondary

#A87042

accent

#8D43E5

background

#F6F7F9

surface

#EBEEF2

border

#C6C9CC

text

#06090E

muted

#7A7B7E

Preview Lab

Preview with #1B4B73

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

Preview Lab → · Contrast checker → · Palette generator →