#1B4B80#1B4B80

#1B4B80 is a dark, moderate cyan. Relative luminance 0.068; OKLCH L 40.9% C 0.103 H 253.5°. Best body text is #FFFFFF at 8.88:1 contrast (WCAG AA passes).

Color values

HEX	#1B4B80
RGB	rgb(27, 75, 128)
HSL	hsl(211, 65%, 30%)
HSV	hsv(211, 79%, 50%)
CMYK	cmyk(78.9%, 41.4%, 0%, 49.8%)
CIE-LAB	lab(31.40, 3.89, -34.51)
CIE-LCH	lch(31.40, 34.73, 276.44°)
OKLab	oklab(40.93% -0.0292 -0.0985)
OKLCH	oklch(40.93% 0.103 253.5)
XYZ	xyz(6.8629, 6.8229, 21.3731)
Luminance	0.0682 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4B80 #80501B

analogous

#1B7D80 #1B4B80 #1D1B80

triadic

#1B4B80 #801B4B #4B801B

tetradic

#1B4B80 #801B7D #80501B #1B801D

square

#1B4B80 #801B7D #80501B #1B801D

split-complementary

#1B4B80 #801D1B #7D801B

monochromatic

#06101B #102D4D #1B4B80 #2669B3 #3F87D6

Accessibility & contrast

On white

8.88

#1B4B80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#1B4B80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4B80

8.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4B80	#FFFFFF	#000000	##FFFFFF
##1B4B80	1.00	8.88	2.36	8.88
#FFFFFF	8.88	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#324F82

Deuteranopia (green-blind)

#21467F

Tritanopia (blue-blind)

#00585F

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1b4b80;
/* rgb */ color: rgb(27, 75, 128);
/* oklch */ color: oklch(40.9% 0.103 253.5);

Tailwind

colors: {
  custom: {
    50: '#677ca5',
    500: '#1b4b80',
    950: '#000000',
  },
}

SCSS

$custom: #1b4b80;
$custom-light: #677ca5;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4b80",
  "rgb": {
    "r": 27,
    "g": 75,
    "b": 128
  },
  "hsl": {
    "h": 211.485,
    "s": 65.161,
    "l": 30.392
  },
  "oklch": {
    "l": 0.40932,
    "c": 0.10278,
    "h": 253.5
  },
  "luminance": 0.06824
}

Semantic roles & 50–950 ramp

primary

#1B4B80

secondary

#B47E43

accent

#9840E8

background

#F6F7FA

surface

#EBEEF4

border

#C6C9CE

text

#07090F

muted

#7A7B7F

Preview Lab

Preview with #1B4B80

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

Preview Lab → · Contrast checker → · Palette generator →