#1B4B85#1B4B85

#1B4B85 is a dark, moderate cyan. Relative luminance 0.070; OKLCH L 41.3% C 0.110 H 255.2°. Best body text is #FFFFFF at 8.78:1 contrast (WCAG AA passes).

Color values

HEX	#1B4B85
RGB	rgb(27, 75, 133)
HSL	hsl(213, 66%, 31%)
HSV	hsv(213, 80%, 52%)
CMYK	cmyk(79.7%, 43.6%, 0%, 47.8%)
CIE-LAB	lab(31.71, 5.91, -37.11)
CIE-LCH	lch(31.71, 37.58, 279.05°)
OKLab	oklab(41.27% -0.028 -0.1062)
OKLCH	oklch(41.27% 0.11 255.2)
XYZ	xyz(7.2001, 6.9578, 23.1493)
Luminance	0.0696 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4B85 #85551B

analogous

#1B8085 #1B4B85 #201B85

triadic

#1B4B85 #851B4B #4B851B

tetradic

#1B4B85 #851B80 #85551B #1B8520

square

#1B4B85 #851B80 #85551B #1B8520

split-complementary

#1B4B85 #85201B #80851B

monochromatic

#06121F #112E52 #1B4B85 #2568B8 #4286D9

Accessibility & contrast

On white

8.78

#1B4B85 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#1B4B85 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4B85

8.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4B85	#FFFFFF	#000000	##FFFFFF
##1B4B85	1.00	8.78	2.39	8.78
#FFFFFF	8.78	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E5087

Deuteranopia (green-blind)

#1B4684

Tritanopia (blue-blind)

#005961

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1b4b85;
/* rgb */ color: rgb(27, 75, 133);
/* oklch */ color: oklch(41.3% 0.110 255.2);

Tailwind

colors: {
  custom: {
    50: '#687ca9',
    500: '#1b4b85',
    950: '#000000',
  },
}

SCSS

$custom: #1b4b85;
$custom-light: #687ca9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4b85",
  "rgb": {
    "r": 27,
    "g": 75,
    "b": 133
  },
  "hsl": {
    "h": 212.83,
    "s": 66.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.41274,
    "c": 0.10982,
    "h": 255.2
  },
  "luminance": 0.06959
}

Semantic roles & 50–950 ramp

primary

#1B4B85

secondary

#B88344

accent

#9C3FE9

background

#F6F7FA

surface

#ECEEF4

border

#C7C9CE

text

#070910

muted

#7A7B7F

Preview Lab

Preview with #1B4B85

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

Preview Lab → · Contrast checker → · Palette generator →