#1B2B8B#1B2B8B

#1B2B8B is a dark, vivid blue. Relative luminance 0.038; OKLCH L 34.9% C 0.159 H 268.7°. Best body text is #FFFFFF at 11.90:1 contrast (WCAG AA passes).

Color values

HEX	#1B2B8B
RGB	rgb(27, 43, 139)
HSL	hsl(231, 67%, 33%)
HSV	hsv(231, 81%, 55%)
CMYK	cmyk(80.6%, 69.1%, 0%, 45.5%)
CIE-LAB	lab(23.08, 30.35, -54.83)
CIE-LCH	lch(23.08, 62.67, 298.96°)
OKLab	oklab(34.91% -0.0037 -0.1588)
OKLCH	oklch(34.91% 0.159 268.7)
XYZ	xyz(5.9745, 3.8242, 24.8444)
Luminance	0.0382 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2B8B #8B7B1B

analogous

#1B638B #1B2B8B #431B8B

triadic

#1B2B8B #8B1B2B #2B8B1B

tetradic

#1B2B8B #8B1B63 #8B7B1B #1B8B43

square

#1B2B8B #8B1B63 #8B7B1B #1B8B43

split-complementary

#1B2B8B #8B431B #638B1B

monochromatic

#070B25 #111B58 #1B2B8B #253BBE #455BDB

Accessibility & contrast

On white

11.90

#1B2B8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#1B2B8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2B8B

11.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2B8B	#FFFFFF	#000000	##FFFFFF
##1B2B8B	1.00	11.90	1.77	11.90
#FFFFFF	11.90	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C8E

Deuteranopia (green-blind)

#003289

Tritanopia (blue-blind)

#004557

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1b2b8b;
/* rgb */ color: rgb(27, 43, 139);
/* oklch */ color: oklch(34.9% 0.159 268.7);

Tailwind

colors: {
  custom: {
    50: '#6c64ae',
    500: '#1b2b8b',
    950: '#000000',
  },
}

SCSS

$custom: #1b2b8b;
$custom-light: #6c64ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2b8b",
  "rgb": {
    "r": 27,
    "g": 43,
    "b": 139
  },
  "hsl": {
    "h": 231.429,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.34905,
    "c": 0.1588,
    "h": 268.7
  },
  "luminance": 0.03825
}

Semantic roles & 50–950 ramp

primary

#1B2B8B

secondary

#BCAB45

accent

#D23DEA

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080510

muted

#7B7A7F

Preview Lab

Preview with #1B2B8B

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

Preview Lab → · Contrast checker → · Palette generator →