#0B1F4F#0B1F4F

#0B1F4F is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.7% C 0.092 H 263.9°. Best body text is #FFFFFF at 15.87:1 contrast (WCAG AA passes).

Color values

HEX	#0B1F4F
RGB	rgb(11, 31, 79)
HSL	hsl(222, 76%, 18%)
HSV	hsv(222, 86%, 31%)
CMYK	cmyk(86.1%, 60.8%, 0%, 69%)
CIE-LAB	lab(13.32, 12.53, -31.79)
CIE-LCH	lch(13.32, 34.17, 291.51°)
OKLab	oklab(25.73% -0.0097 -0.0917)
OKLCH	oklch(25.73% 0.092 263.9)
XYZ	xyz(2.0388, 1.6154, 7.6000)
Luminance	0.0162 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0B1F4F #4F3B0B

analogous

#0B414F #0B1F4F #190B4F

triadic

#0B1F4F #4F0B1F #1F4F0B

tetradic

#0B1F4F #4F0B41 #4F3B0B #0B4F19

square

#0B1F4F #4F0B41 #4F3B0B #0B4F19

split-complementary

#0B1F4F #4F190B #414F0B

monochromatic

#040B1B #040B1B #0B1F4F #123485 #1A49BA

Accessibility & contrast

On white

15.87

#0B1F4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#0B1F4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0B1F4F

15.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0B1F4F	#FFFFFF	#000000	##FFFFFF
##0B1F4F	1.00	15.87	1.32	15.87
#FFFFFF	15.87	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002551

Deuteranopia (green-blind)

#001F4E

Tritanopia (blue-blind)

#002B33

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #0b1f4f;
/* rgb */ color: rgb(11, 31, 79);
/* oklch */ color: oklch(25.7% 0.092 263.9);

Tailwind

colors: {
  custom: {
    50: '#575a81',
    500: '#0b1f4f',
    950: '#000000',
  },
}

SCSS

$custom: #0b1f4f;
$custom-light: #575a81;
$custom-dark: #000000;

JSON

{
  "hex": "#0b1f4f",
  "rgb": {
    "r": 11,
    "g": 31,
    "b": 79
  },
  "hsl": {
    "h": 222.353,
    "s": 75.556,
    "l": 17.647
  },
  "oklch": {
    "l": 0.25728,
    "c": 0.09224,
    "h": 263.9
  },
  "luminance": 0.01616
}

Semantic roles & 50–950 ramp

primary

#0B1F4F

secondary

#8B6F2B

accent

#BB36F2

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #0B1F4F

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

Preview Lab → · Contrast checker → · Palette generator →