#0F173B#0F173B

#0F173B is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 22.2% C 0.070 H 270.3°. Best body text is #FFFFFF at 17.41:1 contrast (WCAG AA passes).

Color values

HEX	#0F173B
RGB	rgb(15, 23, 59)
HSL	hsl(229, 59%, 15%)
HSV	hsv(229, 75%, 23%)
CMYK	cmyk(74.6%, 61%, 0%, 76.9%)
CIE-LAB	lab(9.24, 10.56, -24.42)
CIE-LCH	lch(9.24, 26.60, 293.38°)
OKLab	oklab(22.16% 0.0004 -0.0701)
OKLCH	oklch(22.16% 0.07 270.3)
XYZ	xyz(1.2925, 1.0300, 4.2675)
Luminance	0.0103 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0F173B #3B330F

analogous

#0F2D3B #0F173B #1D0F3B

triadic

#0F173B #3B0F17 #173B0F

tetradic

#0F173B #3B0F2D #3B330F #0F3B1D

square

#0F173B #3B0F2D #3B330F #0F3B1D

split-complementary

#0F173B #3B1D0F #2D3B0F

monochromatic

#060A18 #060A18 #0F173B #1B2A6C #283D9D

Accessibility & contrast

On white

17.41

#0F173B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#0F173B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0F173B

17.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0F173B	#FFFFFF	#000000	##FFFFFF
##0F173B	1.00	17.41	1.21	17.41
#FFFFFF	17.41	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#031C3C

Deuteranopia (green-blind)

#00183A

Tritanopia (blue-blind)

#001F26

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #0f173b;
/* rgb */ color: rgb(15, 23, 59);
/* oklch */ color: oklch(22.2% 0.070 270.3);

Tailwind

colors: {
  custom: {
    50: '#535371',
    500: '#0f173b',
    950: '#000000',
  },
}

SCSS

$custom: #0f173b;
$custom-light: #535371;
$custom-dark: #000000;

JSON

{
  "hex": "#0f173b",
  "rgb": {
    "r": 15,
    "g": 23,
    "b": 59
  },
  "hsl": {
    "h": 229.091,
    "s": 59.459,
    "l": 14.51
  },
  "oklch": {
    "l": 0.22155,
    "c": 0.0701,
    "h": 270.3
  },
  "luminance": 0.0103
}

Semantic roles & 50–950 ramp

primary

#0F173B

secondary

#756930

accent

#C645E3

background

#F4F4F6

surface

#E8E7EC

border

#C4C3C7

text

#030207

muted

#78787A

Preview Lab

Preview with #0F173B

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

Preview Lab → · Contrast checker → · Palette generator →