#1B2D8F#1B2D8F

#1B2D8F is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.7% C 0.162 H 268.2°. Best body text is #FFFFFF at 11.55:1 contrast (WCAG AA passes).

Color values

HEX	#1B2D8F
RGB	rgb(27, 45, 143)
HSL	hsl(231, 68%, 33%)
HSV	hsv(231, 81%, 56%)
CMYK	cmyk(81.1%, 68.5%, 0%, 43.9%)
CIE-LAB	lab(23.97, 30.55, -55.85)
CIE-LCH	lch(23.97, 63.66, 298.68°)
OKLab	oklab(35.68% -0.0051 -0.1617)
OKLCH	oklch(35.68% 0.162 268.2)
XYZ	xyz(6.3466, 4.0922, 26.4367)
Luminance	0.0409 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2D8F #8F7D1B

analogous

#1B678F #1B2D8F #431B8F

triadic

#1B2D8F #8F1B2D #2D8F1B

tetradic

#1B2D8F #8F1B67 #8F7D1B #1B8F43

square

#1B2D8F #8F1B67 #8F7D1B #1B8F43

split-complementary

#1B2D8F #8F431B #678F1B

monochromatic

#080D28 #111D5C #1B2D8F #253DC2 #485FDC

Accessibility & contrast

On white

11.55

#1B2D8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#1B2D8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2D8F

11.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2D8F	#FFFFFF	#000000	##FFFFFF
##1B2D8F	1.00	11.55	1.82	11.55
#FFFFFF	11.55	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F92

Deuteranopia (green-blind)

#00348D

Tritanopia (blue-blind)

#00485A

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1b2d8f;
/* rgb */ color: rgb(27, 45, 143);
/* oklch */ color: oklch(35.7% 0.162 268.2);

Tailwind

colors: {
  custom: {
    50: '#6d66b1',
    500: '#1b2d8f',
    950: '#000000',
  },
}

SCSS

$custom: #1b2d8f;
$custom-light: #6d66b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2d8f",
  "rgb": {
    "r": 27,
    "g": 45,
    "b": 143
  },
  "hsl": {
    "h": 230.69,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.35676,
    "c": 0.1618,
    "h": 268.2
  },
  "luminance": 0.04093
}

Semantic roles & 50–950 ramp

primary

#1B2D8F

secondary

#BEAC48

accent

#D03DEB

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080611

muted

#7B7A80

Preview Lab

Preview with #1B2D8F

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

Preview Lab → · Contrast checker → · Palette generator →