#1B409F#1B409F

#1B409F is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.9% C 0.160 H 264.2°. Best body text is #FFFFFF at 9.21:1 contrast (WCAG AA passes).

Color values

HEX	#1B409F
RGB	rgb(27, 64, 159)
HSL	hsl(223, 71%, 36%)
HSV	hsv(223, 83%, 62%)
CMYK	cmyk(83%, 59.7%, 0%, 37.6%)
CIE-LAB	lab(30.40, 23.94, -55.12)
CIE-LCH	lch(30.40, 60.09, 293.47°)
OKLab	oklab(40.88% -0.0161 -0.1594)
OKLCH	oklch(40.88% 0.16 264.2)
XYZ	xyz(8.5412, 6.4020, 33.5797)
Luminance	0.0640 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B409F #9F7A1B

analogous

#1B829F #1B409F #381B9F

triadic

#1B409F #9F1B40 #409F1B

tetradic

#1B409F #9F1B82 #9F7A1B #1B9F38

square

#1B409F #9F1B82 #9F7A1B #1B9F38

split-complementary

#1B409F #9F381B #829F1B

monochromatic

#091636 #122B6B #1B409F #2455D3 #537BE2

Accessibility & contrast

On white

9.21

#1B409F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#1B409F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B409F

9.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B409F	#FFFFFF	#000000	##FFFFFF
##1B409F	1.00	9.21	2.28	9.21
#FFFFFF	9.21	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA2

Deuteranopia (green-blind)

#00429D

Tritanopia (blue-blind)

#005869

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1b409f;
/* rgb */ color: rgb(27, 64, 159);
/* oklch */ color: oklch(40.9% 0.160 264.2);

Tailwind

colors: {
  custom: {
    50: '#7074bc',
    500: '#1b409f',
    950: '#000000',
  },
}

SCSS

$custom: #1b409f;
$custom-light: #7074bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b409f",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 159
  },
  "hsl": {
    "h": 223.182,
    "s": 70.968,
    "l": 36.471
  },
  "oklch": {
    "l": 0.40882,
    "c": 0.16017,
    "h": 264.2
  },
  "luminance": 0.06403
}

Semantic roles & 50–950 ramp

primary

#1B409F

secondary

#C5A451

accent

#BB3AEE

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1B409F

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

Preview Lab → · Contrast checker → · Palette generator →