#1B2B4E#1B2B4E

#1B2B4E is a dark, moderate blue. Relative luminance 0.025; OKLCH L 29.5% C 0.067 H 264.2°. Best body text is #FFFFFF at 13.98:1 contrast (WCAG AA passes).

Color values

HEX	#1B2B4E
RGB	rgb(27, 43, 78)
HSL	hsl(221, 49%, 21%)
HSV	hsv(221, 65%, 31%)
CMYK	cmyk(65.4%, 44.9%, 0%, 69.4%)
CIE-LAB	lab(17.97, 5.98, -23.60)
CIE-LCH	lch(17.97, 24.34, 284.21°)
OKLab	oklab(29.48% -0.0069 -0.0671)
OKLCH	oklch(29.48% 0.067 264.2)
XYZ	xyz(2.6905, 2.5106, 7.5491)
Luminance	0.0251 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2B4E #4E3E1B

analogous

#1B444E #1B2B4E #241B4E

triadic

#1B2B4E #4E1B2B #2B4E1B

tetradic

#1B2B4E #4E1B44 #4E3E1B #1B4E24

square

#1B2B4E #4E1B44 #4E3E1B #1B4E24

split-complementary

#1B2B4E #4E241B #444E1B

monochromatic

#080D17 #0B1221 #1B2B4E #2B447B #3A5DA9

Accessibility & contrast

On white

13.98

#1B2B4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#1B2B4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2B4E

13.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2B4E	#FFFFFF	#000000	##FFFFFF
##1B2B4E	1.00	13.98	1.50	13.98
#FFFFFF	13.98	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	13.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C2E4F

Deuteranopia (green-blind)

#152A4D

Tritanopia (blue-blind)

#003338

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1b2b4e;
/* rgb */ color: rgb(27, 43, 78);
/* oklch */ color: oklch(29.5% 0.067 264.2);

Tailwind

colors: {
  custom: {
    50: '#5d6480',
    500: '#1b2b4e',
    950: '#000000',
  },
}

SCSS

$custom: #1b2b4e;
$custom-light: #5d6480;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2b4e",
  "rgb": {
    "r": 27,
    "g": 43,
    "b": 78
  },
  "hsl": {
    "h": 221.176,
    "s": 48.571,
    "l": 20.588
  },
  "oklch": {
    "l": 0.2948,
    "c": 0.06744,
    "h": 264.2
  },
  "luminance": 0.02511
}

Semantic roles & 50–950 ramp

primary

#1B2B4E

secondary

#846F41

accent

#AD50D8

background

#F5F5F7

surface

#E9EAEE

border

#C5C6C9

text

#04050A

muted

#79797C

Preview Lab

Preview with #1B2B4E

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

Preview Lab → · Contrast checker → · Palette generator →