#1B4E80#1B4E80

#1B4E80 is a dark, moderate cyan. Relative luminance 0.072; OKLCH L 41.7% C 0.099 H 251.2°. Best body text is #FFFFFF at 8.58:1 contrast (WCAG AA passes).

Color values

HEX	#1B4E80
RGB	rgb(27, 78, 128)
HSL	hsl(210, 65%, 30%)
HSV	hsv(210, 79%, 50%)
CMYK	cmyk(78.9%, 39.1%, 0%, 49.8%)
CIE-LAB	lab(32.35, 1.90, -33.00)
CIE-LCH	lch(32.35, 33.06, 273.30°)
OKLab	oklab(41.67% -0.0321 -0.0941)
OKLCH	oklch(41.67% 0.099 251.2)
XYZ	xyz(7.0712, 7.2395, 21.4426)
Luminance	0.0724 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4E80 #804D1B

analogous

#1B807F #1B4E80 #1B1C80

triadic

#1B4E80 #801B4E #4E801B

tetradic

#1B4E80 #7F1B80 #804D1B #1C801B

square

#1B4E80 #7F1B80 #804D1B #1C801B

split-complementary

#1B4E80 #801B1C #807F1B

monochromatic

#06101B #102F4D #1B4E80 #266DB3 #3F8BD6

Accessibility & contrast

On white

8.58

#1B4E80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#1B4E80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4E80

8.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4E80	#FFFFFF	#000000	##FFFFFF
##1B4E80	1.00	8.58	2.45	8.58
#FFFFFF	8.58	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#375182

Deuteranopia (green-blind)

#27487F

Tritanopia (blue-blind)

#005A61

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1b4e80;
/* rgb */ color: rgb(27, 78, 128);
/* oklch */ color: oklch(41.7% 0.099 251.2);

Tailwind

colors: {
  custom: {
    50: '#677fa5',
    500: '#1b4e80',
    950: '#000000',
  },
}

SCSS

$custom: #1b4e80;
$custom-light: #677fa5;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4e80",
  "rgb": {
    "r": 27,
    "g": 78,
    "b": 128
  },
  "hsl": {
    "h": 209.703,
    "s": 65.161,
    "l": 30.392
  },
  "oklch": {
    "l": 0.41671,
    "c": 0.09941,
    "h": 251.2
  },
  "luminance": 0.0724
}

Semantic roles & 50–950 ramp

primary

#1B4E80

secondary

#B47B43

accent

#9340E8

background

#F6F7FA

surface

#EBEEF4

border

#C6C9CE

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #1B4E80

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

Preview Lab → · Contrast checker → · Palette generator →