#1B3755#1B3755

#1B3755 is a dark, moderate cyan. Relative luminance 0.036; OKLCH L 33.1% C 0.063 H 251.7°. Best body text is #FFFFFF at 12.18:1 contrast (WCAG AA passes).

Color values

HEX	#1B3755
RGB	rgb(27, 55, 85)
HSL	hsl(211, 52%, 22%)
HSV	hsv(211, 68%, 33%)
CMYK	cmyk(68.2%, 35.3%, 0%, 66.7%)
CIE-LAB	lab(22.38, 0.25, -21.31)
CIE-LCH	lch(22.38, 21.31, 270.68°)
OKLab	oklab(33.05% -0.0199 -0.0602)
OKLCH	oklch(33.05% 0.063 251.7)
XYZ	xyz(3.4573, 3.6209, 9.1093)
Luminance	0.0362 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3755 #55391B

analogous

#1B5455 #1B3755 #1C1B55

triadic

#1B3755 #551B37 #37551B

tetradic

#1B3755 #551B54 #55391B #1B551C

square

#1B3755 #551B54 #55391B #1B551C

split-complementary

#1B3755 #551C1B #54551B

monochromatic

#070F17 #0C1927 #1B3755 #2A5583 #3973B2

Accessibility & contrast

On white

12.18

#1B3755 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#1B3755 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3755

12.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3755	#FFFFFF	#000000	##FFFFFF
##1B3755	1.00	12.18	1.72	12.18
#FFFFFF	12.18	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A3956

Deuteranopia (green-blind)

#223354

Tritanopia (blue-blind)

#003E42

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1b3755;
/* rgb */ color: rgb(27, 55, 85);
/* oklch */ color: oklch(33.1% 0.063 251.7);

Tailwind

colors: {
  custom: {
    50: '#5e6d85',
    500: '#1b3755',
    950: '#000000',
  },
}

SCSS

$custom: #1b3755;
$custom-light: #5e6d85;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3755",
  "rgb": {
    "r": 27,
    "g": 55,
    "b": 85
  },
  "hsl": {
    "h": 211.034,
    "s": 51.786,
    "l": 21.961
  },
  "oklch": {
    "l": 0.3305,
    "c": 0.06344,
    "h": 251.7
  },
  "luminance": 0.03621
}

Semantic roles & 50–950 ramp

primary

#1B3755

secondary

#8B6741

accent

#964DDB

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#05070B

muted

#797A7C

Preview Lab

Preview with #1B3755

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

Preview Lab → · Contrast checker → · Palette generator →