#1B4E9D#1B4E9D

#1B4E9D is a dark, vivid blue. Relative luminance 0.081; OKLCH L 43.7% C 0.140 H 259.3°. Best body text is #FFFFFF at 8.01:1 contrast (WCAG AA passes).

Color values

HEX	#1B4E9D
RGB	rgb(27, 78, 157)
HSL	hsl(216, 71%, 36%)
HSV	hsv(216, 83%, 62%)
CMYK	cmyk(82.8%, 50.3%, 0%, 38.4%)
CIE-LAB	lab(34.22, 13.60, -47.71)
CIE-LCH	lch(34.22, 49.61, 285.91°)
OKLab	oklab(43.73% -0.026 -0.1373)
OKLCH	oklch(43.73% 0.14 259.3)
XYZ	xyz(9.2600, 8.1150, 32.9701)
Luminance	0.0812 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4E9D #9D6A1B

analogous

#1B8F9D #1B4E9D #291B9D

triadic

#1B4E9D #9D1B4E #4E9D1B

tetradic

#1B4E9D #9D1B8F #9D6A1B #1B9D29

square

#1B4E9D #9D1B8F #9D6A1B #1B9D29

split-complementary

#1B4E9D #9D291B #8F9D1B

monochromatic

#091A35 #123469 #1B4E9D #2468D1 #518AE1

Accessibility & contrast

On white

8.01

#1B4E9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#1B4E9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4E9D

8.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4E9D	#FFFFFF	#000000	##FFFFFF
##1B4E9D	1.00	8.01	2.62	8.01
#FFFFFF	8.01	1.00	21.00	1.00
#000000	2.62	21.00	1.00	21.00
##FFFFFF	8.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E57A0

Deuteranopia (green-blind)

#004B9B

Tritanopia (blue-blind)

#00616E

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1b4e9d;
/* rgb */ color: rgb(27, 78, 157);
/* oklch */ color: oklch(43.7% 0.140 259.3);

Tailwind

colors: {
  custom: {
    50: '#6e7eba',
    500: '#1b4e9d',
    950: '#000000',
  },
}

SCSS

$custom: #1b4e9d;
$custom-light: #6e7eba;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4e9d",
  "rgb": {
    "r": 27,
    "g": 78,
    "b": 157
  },
  "hsl": {
    "h": 216.462,
    "s": 70.652,
    "l": 36.078
  },
  "oklch": {
    "l": 0.43727,
    "c": 0.13977,
    "h": 259.3
  },
  "luminance": 0.08116
}

Semantic roles & 50–950 ramp

primary

#1B4E9D

secondary

#C49650

accent

#A73AED

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A12

muted

#7B7C81

Preview Lab

Preview with #1B4E9D

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

Preview Lab → · Contrast checker → · Palette generator →