#1B409E#1B409E

#1B409E is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.8% C 0.159 H 264.2°. Best body text is #FFFFFF at 9.24:1 contrast (WCAG AA passes).

Color values

HEX	#1B409E
RGB	rgb(27, 64, 158)
HSL	hsl(223, 71%, 36%)
HSV	hsv(223, 83%, 62%)
CMYK	cmyk(82.9%, 59.5%, 0%, 38%)
CIE-LAB	lab(30.32, 23.54, -54.65)
CIE-LCH	lch(30.32, 59.50, 293.30°)
OKLab	oklab(40.79% -0.0162 -0.158)
OKLCH	oklch(40.79% 0.159 264.2)
XYZ	xyz(8.4547, 6.3674, 33.1245)
Luminance	0.0637 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B409E #9E791B

analogous

#1B829E #1B409E #371B9E

triadic

#1B409E #9E1B40 #409E1B

tetradic

#1B409E #9E1B82 #9E791B #1B9E37

square

#1B409E #9E1B82 #9E791B #1B9E37

split-complementary

#1B409E #9E371B #829E1B

monochromatic

#091635 #122B6A #1B409E #2455D2 #527AE1

Accessibility & contrast

On white

9.24

#1B409E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#1B409E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B409E

9.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B409E	#FFFFFF	#000000	##FFFFFF
##1B409E	1.00	9.24	2.27	9.24
#FFFFFF	9.24	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA1

Deuteranopia (green-blind)

#00429C

Tritanopia (blue-blind)

#005868

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1b409e;
/* rgb */ color: rgb(27, 64, 158);
/* oklch */ color: oklch(40.8% 0.159 264.2);

Tailwind

colors: {
  custom: {
    50: '#6f74bb',
    500: '#1b409e',
    950: '#000000',
  },
}

SCSS

$custom: #1b409e;
$custom-light: #6f74bb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b409e",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 158
  },
  "hsl": {
    "h": 223.053,
    "s": 70.811,
    "l": 36.275
  },
  "oklch": {
    "l": 0.40793,
    "c": 0.1588,
    "h": 264.2
  },
  "luminance": 0.06368
}

Semantic roles & 50–950 ramp

primary

#1B409E

secondary

#C4A451

accent

#BB3AEE

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1B409E

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

Preview Lab → · Contrast checker → · Palette generator →