#1B3874#1B3874

#1B3874 is a dark, moderate blue. Relative luminance 0.043; OKLCH L 35.5% C 0.109 H 262.7°. Best body text is #FFFFFF at 11.26:1 contrast (WCAG AA passes).

Color values

HEX	#1B3874
RGB	rgb(27, 56, 116)
HSL	hsl(220, 62%, 28%)
HSV	hsv(220, 77%, 45%)
CMYK	cmyk(76.7%, 51.7%, 0%, 54.5%)
CIE-LAB	lab(24.71, 12.10, -37.70)
CIE-LCH	lch(24.71, 39.59, 287.79°)
OKLab	oklab(35.5% -0.0138 -0.1083)
OKLCH	oklch(35.5% 0.109 262.7)
XYZ	xyz(5.0174, 4.3218, 17.0894)
Luminance	0.0432 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3874 #74571B

analogous

#1B6474 #1B3874 #2A1B74

triadic

#1B3874 #741B38 #38741B

tetradic

#1B3874 #741B64 #74571B #1B742A

square

#1B3874 #741B64 #74571B #1B742A

split-complementary

#1B3874 #742A1B #64741B

monochromatic

#060C19 #0F2042 #1B3874 #2750A6 #396AD1

Accessibility & contrast

On white

11.26

#1B3874 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#1B3874 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3874

11.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3874	#FFFFFF	#000000	##FFFFFF
##1B3874	1.00	11.26	1.86	11.26
#FFFFFF	11.26	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#153F76

Deuteranopia (green-blind)

#003773

Tritanopia (blue-blind)

#004650

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b3874;
/* rgb */ color: rgb(27, 56, 116);
/* oklch */ color: oklch(35.5% 0.109 262.7);

Tailwind

colors: {
  custom: {
    50: '#656e9c',
    500: '#1b3874',
    950: '#000000',
  },
}

SCSS

$custom: #1b3874;
$custom-light: #656e9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3874",
  "rgb": {
    "r": 27,
    "g": 56,
    "b": 116
  },
  "hsl": {
    "h": 220.449,
    "s": 62.238,
    "l": 28.039
  },
  "oklch": {
    "l": 0.35505,
    "c": 0.10917,
    "h": 262.7
  },
  "luminance": 0.04322
}

Semantic roles & 50–950 ramp

primary

#1B3874

secondary

#A98742

accent

#B042E5

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #1B3874

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

Preview Lab → · Contrast checker → · Palette generator →