#1B4B74#1B4B74

#1B4B74 is a dark, moderate cyan. Relative luminance 0.065; OKLCH L 40.2% C 0.086 H 247.8°. Best body text is #FFFFFF at 9.11:1 contrast (WCAG AA passes).

Color values

HEX	#1B4B74
RGB	rgb(27, 75, 116)
HSL	hsl(208, 62%, 28%)
HSV	hsv(208, 77%, 45%)
CMYK	cmyk(76.7%, 35.3%, 0%, 54.5%)
CIE-LAB	lab(30.70, -0.90, -28.13)
CIE-LCH	lch(30.70, 28.15, 268.17°)
OKLab	oklab(40.16% -0.0326 -0.0799)
OKLCH	oklch(40.16% 0.086 247.8)
XYZ	xyz(6.1193, 6.5254, 17.4566)
Luminance	0.0653 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4B74 #74441B

analogous

#1B7470 #1B4B74 #1B1F74

triadic

#1B4B74 #741B4B #4B741B

tetradic

#1B4B74 #701B74 #74441B #1F741B

square

#1B4B74 #701B74 #74441B #1F741B

split-complementary

#1B4B74 #741B1F #74701B

monochromatic

#061019 #0F2B42 #1B4B74 #276BA6 #398BD1

Accessibility & contrast

On white

9.11

#1B4B74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#1B4B74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4B74

9.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4B74	#FFFFFF	#000000	##FFFFFF
##1B4B74	1.00	9.11	2.31	9.11
#FFFFFF	9.11	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#384D76

Deuteranopia (green-blind)

#2C4573

Tritanopia (blue-blind)

#00555A

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1b4b74;
/* rgb */ color: rgb(27, 75, 116);
/* oklch */ color: oklch(40.2% 0.086 247.8);

Tailwind

colors: {
  custom: {
    50: '#657d9c',
    500: '#1b4b74',
    950: '#000000',
  },
}

SCSS

$custom: #1b4b74;
$custom-light: #657d9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4b74",
  "rgb": {
    "r": 27,
    "g": 75,
    "b": 116
  },
  "hsl": {
    "h": 207.64,
    "s": 62.238,
    "l": 28.039
  },
  "oklch": {
    "l": 0.40157,
    "c": 0.08625,
    "h": 247.8
  },
  "luminance": 0.06526
}

Semantic roles & 50–950 ramp

primary

#1B4B74

secondary

#A97142

accent

#8D42E5

background

#F6F7F9

surface

#EBEEF2

border

#C6C9CC

text

#06090E

muted

#7A7B7E

Preview Lab

Preview with #1B4B74

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

Preview Lab → · Contrast checker → · Palette generator →