#1B2B4D#1B2B4D

#1B2B4D is a dark, moderate blue. Relative luminance 0.025; OKLCH L 29.4% C 0.066 H 263.8°. Best body text is #FFFFFF at 14.01:1 contrast (WCAG AA passes).

Color values

HEX	#1B2B4D
RGB	rgb(27, 43, 77)
HSL	hsl(221, 48%, 20%)
HSV	hsv(221, 65%, 30%)
CMYK	cmyk(64.9%, 44.2%, 0%, 69.8%)
CIE-LAB	lab(17.90, 5.58, -23.02)
CIE-LCH	lch(17.90, 23.69, 283.62°)
OKLab	oklab(29.41% -0.0071 -0.0654)
OKLCH	oklch(29.41% 0.066 263.8)
XYZ	xyz(2.6550, 2.4964, 7.3617)
Luminance	0.0250 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2B4D #4D3D1B

analogous

#1B444D #1B2B4D #241B4D

triadic

#1B2B4D #4D1B2B #2B4D1B

tetradic

#1B2B4D #4D1B44 #4D3D1B #1B4D24

square

#1B2B4D #4D1B44 #4D3D1B #1B4D24

split-complementary

#1B2B4D #4D241B #444D1B

monochromatic

#080D17 #0B1220 #1B2B4D #2B447A #3B5EA8

Accessibility & contrast

On white

14.01

#1B2B4D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#1B2B4D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2B4D

14.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2B4D	#FFFFFF	#000000	##FFFFFF
##1B2B4D	1.00	14.01	1.50	14.01
#FFFFFF	14.01	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	14.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C2E4E

Deuteranopia (green-blind)

#162A4C

Tritanopia (blue-blind)

#003338

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1b2b4d;
/* rgb */ color: rgb(27, 43, 77);
/* oklch */ color: oklch(29.4% 0.066 263.8);

Tailwind

colors: {
  custom: {
    50: '#5c647f',
    500: '#1b2b4d',
    950: '#000000',
  },
}

SCSS

$custom: #1b2b4d;
$custom-light: #5c647f;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2b4d",
  "rgb": {
    "r": 27,
    "g": 43,
    "b": 77
  },
  "hsl": {
    "h": 220.8,
    "s": 48.077,
    "l": 20.392
  },
  "oklch": {
    "l": 0.2941,
    "c": 0.06578,
    "h": 263.8
  },
  "luminance": 0.02497
}

Semantic roles & 50–950 ramp

primary

#1B2B4D

secondary

#836E41

accent

#AC50D8

background

#F5F5F7

surface

#E9EAEE

border

#C5C6C9

text

#04050A

muted

#79797C

Preview Lab

Preview with #1B2B4D

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

Preview Lab → · Contrast checker → · Palette generator →