#1B236E#1B236E

#1B236E is a dark, vivid blue. Relative luminance 0.026; OKLCH L 30.5% C 0.128 H 271.5°. Best body text is #FFFFFF at 13.89:1 contrast (WCAG AA passes).

Color values

HEX	#1B236E
RGB	rgb(27, 35, 110)
HSL	hsl(234, 61%, 27%)
HSV	hsv(234, 75%, 43%)
CMYK	cmyk(75.5%, 68.2%, 0%, 56.9%)
CIE-LAB	lab(18.19, 24.59, -44.44)
CIE-LCH	lch(18.19, 50.79, 298.96°)
OKLab	oklab(30.46% 0.0035 -0.1284)
OKLCH	oklch(30.46% 0.128 271.5)
XYZ	xyz(3.8665, 2.5605, 15.0393)
Luminance	0.0256 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B236E #6E661B

analogous

#1B4D6E #1B236E #3D1B6E

triadic

#1B236E #6E1B23 #236E1B

tetradic

#1B236E #6E1B4D #6E661B #1B6E3D

square

#1B236E #6E1B4D #6E661B #1B6E3D

split-complementary

#1B236E #6E3D1B #4D6E1B

monochromatic

#060819 #0F133D #1B236E #27339F #3644CE

Accessibility & contrast

On white

13.89

#1B236E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#1B236E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B236E

13.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B236E	#FFFFFF	#000000	##FFFFFF
##1B236E	1.00	13.89	1.51	13.89
#FFFFFF	13.89	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003070

Deuteranopia (green-blind)

#00296D

Tritanopia (blue-blind)

#003745

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1b236e;
/* rgb */ color: rgb(27, 35, 110);
/* oklch */ color: oklch(30.5% 0.128 271.5);

Tailwind

colors: {
  custom: {
    50: '#655e98',
    500: '#1b236e',
    950: '#000000',
  },
}

SCSS

$custom: #1b236e;
$custom-light: #655e98;
$custom-dark: #000000;

JSON

{
  "hex": "#1b236e",
  "rgb": {
    "r": 27,
    "g": 35,
    "b": 110
  },
  "hsl": {
    "h": 234.217,
    "s": 60.584,
    "l": 26.863
  },
  "oklch": {
    "l": 0.30464,
    "c": 0.12846,
    "h": 271.5
  },
  "luminance": 0.02561
}

Semantic roles & 50–950 ramp

primary

#1B236E

secondary

#A39A42

accent

#D444E4

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06040E

muted

#7A797E

Preview Lab

Preview with #1B236E

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

Preview Lab → · Contrast checker → · Palette generator →