#1B358A#1B358A

#1B358A is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.7% C 0.145 H 266.2°. Best body text is #FFFFFF at 10.92:1 contrast (WCAG AA passes).

Color values

HEX	#1B358A
RGB	rgb(27, 53, 138)
HSL	hsl(226, 67%, 32%)
HSV	hsv(226, 80%, 54%)
CMYK	cmyk(80.4%, 61.6%, 0%, 45.9%)
CIE-LAB	lab(25.60, 23.14, -50.08)
CIE-LCH	lch(25.60, 55.16, 294.80°)
OKLab	oklab(36.74% -0.0097 -0.1447)
OKLCH	oklch(36.74% 0.145 266.2)
XYZ	xyz(6.3109, 4.6135, 24.5977)
Luminance	0.0461 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B358A #8A701B

analogous

#1B6D8A #1B358A #391B8A

triadic

#1B358A #8A1B35 #358A1B

tetradic

#1B358A #8A1B6D #8A701B #1B8A39

square

#1B358A #8A1B6D #8A701B #1B8A39

split-complementary

#1B358A #8A391B #6D8A1B

monochromatic

#070E24 #112157 #1B358A #2549BD #4568DB

Accessibility & contrast

On white

10.92

#1B358A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#1B358A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B358A

10.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B358A	#FFFFFF	#000000	##FFFFFF
##1B358A	1.00	10.92	1.92	10.92
#FFFFFF	10.92	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00428D

Deuteranopia (green-blind)

#003888

Tritanopia (blue-blind)

#004B5A

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b358a;
/* rgb */ color: rgb(27, 53, 138);
/* oklch */ color: oklch(36.7% 0.145 266.2);

Tailwind

colors: {
  custom: {
    50: '#6b6bad',
    500: '#1b358a',
    950: '#000000',
  },
}

SCSS

$custom: #1b358a;
$custom-light: #6b6bad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b358a",
  "rgb": {
    "r": 27,
    "g": 53,
    "b": 138
  },
  "hsl": {
    "h": 225.946,
    "s": 67.273,
    "l": 32.353
  },
  "oklch": {
    "l": 0.36736,
    "c": 0.14506,
    "h": 266.2
  },
  "luminance": 0.04614
}

Semantic roles & 50–950 ramp

primary

#1B358A

secondary

#BCA045

accent

#C23EEA

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1B358A

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

Preview Lab → · Contrast checker → · Palette generator →