#1B3A52#1B3A52

#1B3A52 is a dark, muted cyan. Relative luminance 0.039; OKLCH L 33.7% C 0.056 H 244.0°. Best body text is #FFFFFF at 11.84:1 contrast (WCAG AA passes).

Color values

HEX	#1B3A52
RGB	rgb(27, 58, 82)
HSL	hsl(206, 50%, 21%)
HSV	hsv(206, 67%, 32%)
CMYK	cmyk(67.1%, 29.3%, 0%, 67.8%)
CIE-LAB	lab(23.23, -2.95, -17.99)
CIE-LCH	lch(23.23, 18.23, 260.69°)
OKLab	oklab(33.67% -0.0247 -0.0506)
OKLCH	oklch(33.67% 0.056 244)
XYZ	xyz(3.4875, 3.8680, 8.5438)
Luminance	0.0387 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3A52 #52331B

analogous

#1B524F #1B3A52 #1B1F52

triadic

#1B3A52 #521B3A #3A521B

tetradic

#1B3A52 #4F1B52 #52331B #1F521B

square

#1B3A52 #4F1B52 #52331B #1F521B

split-complementary

#1B3A52 #521B1F #524F1B

monochromatic

#081017 #0C1924 #1B3A52 #2A5B80 #397BAE

Accessibility & contrast

On white

11.84

#1B3A52 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#1B3A52 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3A52

11.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3A52	#FFFFFF	#000000	##FFFFFF
##1B3A52	1.00	11.84	1.77	11.84
#FFFFFF	11.84	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F3A53

Deuteranopia (green-blind)

#283552

Tritanopia (blue-blind)

#004042

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1b3a52;
/* rgb */ color: rgb(27, 58, 82);
/* oklch */ color: oklch(33.7% 0.056 244.0);

Tailwind

colors: {
  custom: {
    50: '#5d7082',
    500: '#1b3a52',
    950: '#000000',
  },
}

SCSS

$custom: #1b3a52;
$custom-light: #5d7082;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3a52",
  "rgb": {
    "r": 27,
    "g": 58,
    "b": 82
  },
  "hsl": {
    "h": 206.182,
    "s": 50.459,
    "l": 21.373
  },
  "oklch": {
    "l": 0.33669,
    "c": 0.05627,
    "h": 244
  },
  "luminance": 0.03868
}

Semantic roles & 50–950 ramp

primary

#1B3A52

secondary

#886041

accent

#8B4EDA

background

#F5F6F8

surface

#E9ECEF

border

#C5C7CA

text

#05070A

muted

#797A7C

Preview Lab

Preview with #1B3A52

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

Preview Lab → · Contrast checker → · Palette generator →