#1B409B#1B409B

#1B409B is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.5% C 0.155 H 263.9°. Best body text is #FFFFFF at 9.32:1 contrast (WCAG AA passes).

Color values

HEX	#1B409B
RGB	rgb(27, 64, 155)
HSL	hsl(223, 70%, 36%)
HSV	hsv(223, 83%, 61%)
CMYK	cmyk(82.6%, 58.7%, 0%, 39.2%)
CIE-LAB	lab(30.07, 22.34, -53.23)
CIE-LCH	lch(30.07, 57.73, 292.77°)
OKLab	oklab(40.53% -0.0163 -0.1538)
OKLCH	oklch(40.53% 0.155 263.9)
XYZ	xyz(8.1997, 6.2654, 31.7812)
Luminance	0.0627 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B409B #9B761B

analogous

#1B809B #1B409B #361B9B

triadic

#1B409B #9B1B40 #409B1B

tetradic

#1B409B #9B1B80 #9B761B #1B9B36

square

#1B409B #9B1B80 #9B761B #1B9B36

split-complementary

#1B409B #9B361B #809B1B

monochromatic

#091533 #122A67 #1B409B #2456CF #507AE0

Accessibility & contrast

On white

9.32

#1B409B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#1B409B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B409B

9.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B409B	#FFFFFF	#000000	##FFFFFF
##1B409B	1.00	9.32	2.25	9.32
#FFFFFF	9.32	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004D9E

Deuteranopia (green-blind)

#004199

Tritanopia (blue-blind)

#005767

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1b409b;
/* rgb */ color: rgb(27, 64, 155);
/* oklch */ color: oklch(40.5% 0.155 263.9);

Tailwind

colors: {
  custom: {
    50: '#6f74b9',
    500: '#1b409b',
    950: '#000000',
  },
}

SCSS

$custom: #1b409b;
$custom-light: #6f74b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b409b",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 155
  },
  "hsl": {
    "h": 222.656,
    "s": 70.33,
    "l": 35.686
  },
  "oklch": {
    "l": 0.40529,
    "c": 0.15469,
    "h": 263.9
  },
  "luminance": 0.06266
}

Semantic roles & 50–950 ramp

primary

#1B409B

secondary

#C3A14F

accent

#BA3BED

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1B409B

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

Preview Lab → · Contrast checker → · Palette generator →