#1B3690#1B3690

#1B3690 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.5% C 0.152 H 266.1°. Best body text is #FFFFFF at 10.62:1 contrast (WCAG AA passes).

Color values

HEX	#1B3690
RGB	rgb(27, 54, 144)
HSL	hsl(226, 68%, 34%)
HSV	hsv(226, 81%, 56%)
CMYK	cmyk(81.3%, 62.5%, 0%, 43.5%)
CIE-LAB	lab(26.40, 24.83, -52.49)
CIE-LCH	lch(26.40, 58.07, 295.32°)
OKLab	oklab(37.49% -0.0103 -0.1518)
OKLCH	oklch(37.49% 0.152 266.1)
XYZ	xyz(6.8034, 4.8842, 26.9643)
Luminance	0.0488 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3690 #90751B

analogous

#1B7090 #1B3690 #3A1B90

triadic

#1B3690 #901B36 #36901B

tetradic

#1B3690 #901B70 #90751B #1B903A

square

#1B3690 #901B70 #90751B #1B903A

split-complementary

#1B3690 #903A1B #70901B

monochromatic

#080F29 #11235C #1B3690 #2549C4 #496BDD

Accessibility & contrast

On white

10.62

#1B3690 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#1B3690 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3690

10.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3690	#FFFFFF	#000000	##FFFFFF
##1B3690	1.00	10.62	1.98	10.62
#FFFFFF	10.62	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004493

Deuteranopia (green-blind)

#00398E

Tritanopia (blue-blind)

#004D5D

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1b3690;
/* rgb */ color: rgb(27, 54, 144);
/* oklch */ color: oklch(37.5% 0.152 266.1);

Tailwind

colors: {
  custom: {
    50: '#6c6cb1',
    500: '#1b3690',
    950: '#000000',
  },
}

SCSS

$custom: #1b3690;
$custom-light: #6c6cb1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3690",
  "rgb": {
    "r": 27,
    "g": 54,
    "b": 144
  },
  "hsl": {
    "h": 226.154,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.37494,
    "c": 0.15215,
    "h": 266.1
  },
  "luminance": 0.04885
}

Semantic roles & 50–950 ramp

primary

#1B3690

secondary

#BFA348

accent

#C33DEB

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1B3690

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

Preview Lab → · Contrast checker → · Palette generator →