#1B287D#1B287D

#1B287D is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.9% C 0.143 H 269.6°. Best body text is #FFFFFF at 12.76:1 contrast (WCAG AA passes).

Color values

HEX	#1B287D
RGB	rgb(27, 40, 125)
HSL	hsl(232, 64%, 30%)
HSV	hsv(232, 78%, 49%)
CMYK	cmyk(78.4%, 68%, 0%, 51%)
CIE-LAB	lab(20.95, 26.99, -49.54)
CIE-LCH	lch(20.95, 56.41, 298.58°)
OKLab	oklab(32.93% -0.001 -0.1433)
OKLCH	oklch(32.93% 0.143 269.6)
XYZ	xyz(4.9112, 3.2307, 19.7628)
Luminance	0.0323 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B287D #7D701B

analogous

#1B597D #1B287D #3F1B7D

triadic

#1B287D #7D1B28 #287D1B

tetradic

#1B287D #7D1B59 #7D701B #1B7D3F

square

#1B287D #7D1B59 #7D701B #1B7D3F

split-complementary

#1B287D #7D3F1B #597D1B

monochromatic

#050819 #10184B #1B287D #2638AF #3D51D5

Accessibility & contrast

On white

12.76

#1B287D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#1B287D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B287D

12.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B287D	#FFFFFF	#000000	##FFFFFF
##1B287D	1.00	12.76	1.65	12.76
#FFFFFF	12.76	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003780

Deuteranopia (green-blind)

#002E7B

Tritanopia (blue-blind)

#003F4E

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b287d;
/* rgb */ color: rgb(27, 40, 125);
/* oklch */ color: oklch(32.9% 0.143 269.6);

Tailwind

colors: {
  custom: {
    50: '#6962a4',
    500: '#1b287d',
    950: '#000000',
  },
}

SCSS

$custom: #1b287d;
$custom-light: #6962a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b287d",
  "rgb": {
    "r": 27,
    "g": 40,
    "b": 125
  },
  "hsl": {
    "h": 232.041,
    "s": 64.474,
    "l": 29.804
  },
  "oklch": {
    "l": 0.32926,
    "c": 0.14331,
    "h": 269.6
  },
  "luminance": 0.03231
}

Semantic roles & 50–950 ramp

primary

#1B287D

secondary

#B1A243

accent

#D140E7

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1B287D

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

Preview Lab → · Contrast checker → · Palette generator →