#1B2D5B#1B2D5B

#1B2D5B is a dark, moderate blue. Relative luminance 0.029; OKLCH L 30.9% C 0.086 H 265.6°. Best body text is #FFFFFF at 13.35:1 contrast (WCAG AA passes).

Color values

HEX	#1B2D5B
RGB	rgb(27, 45, 91)
HSL	hsl(223, 54%, 23%)
HSV	hsv(223, 70%, 36%)
CMYK	cmyk(70.3%, 50.5%, 0%, 64.3%)
CIE-LAB	lab(19.49, 9.76, -29.86)
CIE-LCH	lch(19.49, 31.42, 288.10°)
OKLab	oklab(30.94% -0.0066 -0.0854)
OKLCH	oklch(30.94% 0.086 265.6)
XYZ	xyz(3.2781, 2.8648, 10.2757)
Luminance	0.0286 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2D5B #5B491B

analogous

#1B4D5B #1B2D5B #291B5B

triadic

#1B2D5B #5B1B2D #2D5B1B

tetradic

#1B2D5B #5B1B4D #5B491B #1B5B29

square

#1B2D5B #5B1B4D #5B491B #1B5B29

split-complementary

#1B2D5B #5B291B #4D5B1B

monochromatic

#070C18 #0D162C #1B2D5B #29448A #375CB9

Accessibility & contrast

On white

13.35

#1B2D5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1B2D5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2D5B

13.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2D5B	#FFFFFF	#000000	##FFFFFF
##1B2D5B	1.00	13.35	1.57	13.35
#FFFFFF	13.35	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#16325D

Deuteranopia (green-blind)

#092C5A

Tritanopia (blue-blind)

#00383F

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1b2d5b;
/* rgb */ color: rgb(27, 45, 91);
/* oklch */ color: oklch(30.9% 0.086 265.6);

Tailwind

colors: {
  custom: {
    50: '#5f658a',
    500: '#1b2d5b',
    950: '#000000',
  },
}

SCSS

$custom: #1b2d5b;
$custom-light: #5f658a;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2d5b",
  "rgb": {
    "r": 27,
    "g": 45,
    "b": 91
  },
  "hsl": {
    "h": 223.125,
    "s": 54.237,
    "l": 23.137
  },
  "oklch": {
    "l": 0.3094,
    "c": 0.08569,
    "h": 265.6
  },
  "luminance": 0.02865
}

Semantic roles & 50–950 ramp

primary

#1B2D5B

secondary

#917A41

accent

#B44ADE

background

#F5F6F8

surface

#EAEBF0

border

#C6C6CB

text

#05050B

muted

#797A7C

Preview Lab

Preview with #1B2D5B

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

Preview Lab → · Contrast checker → · Palette generator →