#1B4B79#1B4B79

#1B4B79 is a dark, moderate cyan. Relative luminance 0.066; OKLCH L 40.5% C 0.093 H 250.5°. Best body text is #FFFFFF at 9.02:1 contrast (WCAG AA passes).

Color values

HEX	#1B4B79
RGB	rgb(27, 75, 121)
HSL	hsl(209, 64%, 29%)
HSV	hsv(209, 78%, 47%)
CMYK	cmyk(77.7%, 38%, 0%, 52.5%)
CIE-LAB	lab(30.98, 1.09, -30.81)
CIE-LCH	lch(30.98, 30.83, 272.02°)
OKLab	oklab(40.47% -0.0311 -0.0877)
OKLCH	oklch(40.47% 0.093 250.5)
XYZ	xyz(6.4180, 6.6449, 19.0298)
Luminance	0.0665 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4B79 #79491B

analogous

#1B7978 #1B4B79 #1B1C79

triadic

#1B4B79 #791B4B #4B791B

tetradic

#1B4B79 #781B79 #79491B #1C791B

square

#1B4B79 #781B79 #79491B #1C791B

split-complementary

#1B4B79 #791B1C #79781B

monochromatic

#061019 #102C47 #1B4B79 #266AAB #3B89D3

Accessibility & contrast

On white

9.02

#1B4B79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#1B4B79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4B79

9.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4B79	#FFFFFF	#000000	##FFFFFF
##1B4B79	1.00	9.02	2.33	9.02
#FFFFFF	9.02	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#364E7B

Deuteranopia (green-blind)

#284578

Tritanopia (blue-blind)

#00565C

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1b4b79;
/* rgb */ color: rgb(27, 75, 121);
/* oklch */ color: oklch(40.5% 0.093 250.5);

Tailwind

colors: {
  custom: {
    50: '#667ca0',
    500: '#1b4b79',
    950: '#000000',
  },
}

SCSS

$custom: #1b4b79;
$custom-light: #667ca0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4b79",
  "rgb": {
    "r": 27,
    "g": 75,
    "b": 121
  },
  "hsl": {
    "h": 209.362,
    "s": 63.514,
    "l": 29.02
  },
  "oklch": {
    "l": 0.40472,
    "c": 0.09306,
    "h": 250.5
  },
  "luminance": 0.06646
}

Semantic roles & 50–950 ramp

primary

#1B4B79

secondary

#AD7743

accent

#9241E7

background

#F6F7F9

surface

#EBEEF2

border

#C6C9CC

text

#06090E

muted

#7A7B7E

Preview Lab

Preview with #1B4B79

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

Preview Lab → · Contrast checker → · Palette generator →