#1B3380#1B3380

#1B3380 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.4% C 0.133 H 266.3°. Best body text is #FFFFFF at 11.46:1 contrast (WCAG AA passes).

Color values

HEX	#1B3380
RGB	rgb(27, 51, 128)
HSL	hsl(226, 65%, 30%)
HSV	hsv(226, 79%, 50%)
CMYK	cmyk(78.9%, 60.2%, 0%, 49.8%)
CIE-LAB	lab(24.19, 20.53, -46.13)
CIE-LCH	lch(24.19, 50.49, 293.99°)
OKLab	oklab(35.41% -0.0086 -0.1332)
OKLCH	oklch(35.41% 0.133 266.3)
XYZ	xyz(5.5307, 4.1586, 20.9291)
Luminance	0.0416 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3380 #80681B

analogous

#1B6580 #1B3380 #361B80

triadic

#1B3380 #801B33 #33801B

tetradic

#1B3380 #801B65 #80681B #1B8036

square

#1B3380 #801B65 #80681B #1B8036

split-complementary

#1B3380 #80361B #65801B

monochromatic

#060B1B #101F4D #1B3380 #2647B3 #3F63D6

Accessibility & contrast

On white

11.46

#1B3380 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#1B3380 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3380

11.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3380	#FFFFFF	#000000	##FFFFFF
##1B3380	1.00	11.46	1.83	11.46
#FFFFFF	11.46	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E83

Deuteranopia (green-blind)

#00357F

Tritanopia (blue-blind)

#004654

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1b3380;
/* rgb */ color: rgb(27, 51, 128);
/* oklch */ color: oklch(35.4% 0.133 266.3);

Tailwind

colors: {
  custom: {
    50: '#686aa6',
    500: '#1b3380',
    950: '#000000',
  },
}

SCSS

$custom: #1b3380;
$custom-light: #686aa6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3380",
  "rgb": {
    "r": 27,
    "g": 51,
    "b": 128
  },
  "hsl": {
    "h": 225.743,
    "s": 65.161,
    "l": 30.392
  },
  "oklch": {
    "l": 0.35411,
    "c": 0.13348,
    "h": 266.3
  },
  "luminance": 0.04159
}

Semantic roles & 50–950 ramp

primary

#1B3380

secondary

#B49943

accent

#C040E8

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1B3380

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

Preview Lab → · Contrast checker → · Palette generator →