#1B405A#1B405A

#1B405A is a dark, moderate cyan. Relative luminance 0.046; OKLCH L 35.7% C 0.062 H 242.0°. Best body text is #FFFFFF at 10.89:1 contrast (WCAG AA passes).

Color values

HEX	#1B405A
RGB	rgb(27, 64, 90)
HSL	hsl(205, 54%, 23%)
HSV	hsv(205, 70%, 35%)
CMYK	cmyk(70%, 28.9%, 0%, 64.7%)
CIE-LAB	lab(25.68, -3.85, -19.42)
CIE-LCH	lch(25.68, 19.79, 258.77°)
OKLab	oklab(35.74% -0.0291 -0.0547)
OKLCH	oklch(35.74% 0.062 242)
XYZ	xyz(4.1302, 4.6376, 10.3484)
Luminance	0.0464 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B405A #5A351B

analogous

#1B5A54 #1B405A #1B205A

triadic

#1B405A #5A1B40 #405A1B

tetradic

#1B405A #541B5A #5A351B #205A1B

square

#1B405A #541B5A #5A351B #205A1B

split-complementary

#1B405A #5A1B20 #5A541B

monochromatic

#071118 #0D1F2B #1B405A #296189 #3783B8

Accessibility & contrast

On white

10.89

#1B405A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1B405A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B405A

10.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B405A	#FFFFFF	#000000	##FFFFFF
##1B405A	1.00	10.89	1.93	10.89
#FFFFFF	10.89	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#34405B

Deuteranopia (green-blind)

#2C3A5A

Tritanopia (blue-blind)

#004649

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b405a;
/* rgb */ color: rgb(27, 64, 90);
/* oklch */ color: oklch(35.7% 0.062 242.0);

Tailwind

colors: {
  custom: {
    50: '#5f7488',
    500: '#1b405a',
    950: '#000000',
  },
}

SCSS

$custom: #1b405a;
$custom-light: #5f7488;
$custom-dark: #000000;

JSON

{
  "hex": "#1b405a",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 90
  },
  "hsl": {
    "h": 204.762,
    "s": 53.846,
    "l": 22.941
  },
  "oklch": {
    "l": 0.35737,
    "c": 0.06192,
    "h": 242
  },
  "luminance": 0.04638
}

Semantic roles & 50–950 ramp

primary

#1B405A

secondary

#906241

accent

#874BDD

background

#F5F7F8

surface

#EAEDF0

border

#C6C8CB

text

#05080B

muted

#797B7C

Preview Lab

Preview with #1B405A

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

Preview Lab → · Contrast checker → · Palette generator →