#0F183B#0F183B

#0F183B is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 22.4% C 0.069 H 269.3°. Best body text is #FFFFFF at 17.30:1 contrast (WCAG AA passes).

Color values

HEX	#0F183B
RGB	rgb(15, 24, 59)
HSL	hsl(228, 59%, 15%)
HSV	hsv(228, 75%, 23%)
CMYK	cmyk(74.6%, 59.3%, 0%, 76.9%)
CIE-LAB	lab(9.57, 9.77, -23.89)
CIE-LCH	lch(9.57, 25.81, 292.24°)
OKLab	oklab(22.4% -0.0008 -0.0685)
OKLCH	oklch(22.4% 0.069 269.3)
XYZ	xyz(1.3128, 1.0705, 4.2743)
Luminance	0.0107 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0F183B #3B320F

analogous

#0F2E3B #0F183B #1C0F3B

triadic

#0F183B #3B0F18 #183B0F

tetradic

#0F183B #3B0F2E #3B320F #0F3B1C

square

#0F183B #3B0F2E #3B320F #0F3B1C

split-complementary

#0F183B #3B1C0F #2E3B0F

monochromatic

#060A18 #060A18 #0F183B #1B2C6C #28409D

Accessibility & contrast

On white

17.30

#0F183B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#0F183B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0F183B

17.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0F183B	#FFFFFF	#000000	##FFFFFF
##0F183B	1.00	17.30	1.21	17.30
#FFFFFF	17.30	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#051D3C

Deuteranopia (green-blind)

#00193A

Tritanopia (blue-blind)

#002026

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #0f183b;
/* rgb */ color: rgb(15, 24, 59);
/* oklch */ color: oklch(22.4% 0.069 269.3);

Tailwind

colors: {
  custom: {
    50: '#535471',
    500: '#0f183b',
    950: '#000000',
  },
}

SCSS

$custom: #0f183b;
$custom-light: #535471;
$custom-dark: #000000;

JSON

{
  "hex": "#0f183b",
  "rgb": {
    "r": 15,
    "g": 24,
    "b": 59
  },
  "hsl": {
    "h": 227.727,
    "s": 59.459,
    "l": 14.51
  },
  "oklch": {
    "l": 0.22402,
    "c": 0.06854,
    "h": 269.3
  },
  "luminance": 0.01071
}

Semantic roles & 50–950 ramp

primary

#0F183B

secondary

#756730

accent

#C245E3

background

#F4F4F6

surface

#E8E7EC

border

#C4C3C7

text

#030207

muted

#78787A

Preview Lab

Preview with #0F183B

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

Preview Lab → · Contrast checker → · Palette generator →