#0A052B#0A052B

#0A052B is a very dark, moderate blue. Relative luminance 0.003; OKLCH L 15.9% C 0.074 H 281.0°. Best body text is #FFFFFF at 19.64:1 contrast (WCAG AA passes).

Color values

HEX	#0A052B
RGB	rgb(10, 5, 43)
HSL	hsl(248, 79%, 9%)
HSV	hsv(248, 88%, 17%)
CMYK	cmyk(76.7%, 88.4%, 0%, 83.1%)
CIE-LAB	lab(3.14, 11.68, -22.45)
CIE-LCH	lch(3.14, 25.31, 297.50°)
OKLab	oklab(15.91% 0.014 -0.0725)
OKLCH	oklch(15.91% 0.074 281)
XYZ	xyz(0.6154, 0.3474, 2.3197)
Luminance	0.0035 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#0A052B #262B05

analogous

#05132B #0A052B #1D052B

triadic

#0A052B #2B0A05 #052B0A

tetradic

#0A052B #2B0513 #262B05 #052B1D

square

#0A052B #2B0513 #262B05 #052B1D

split-complementary

#0A052B #2B1D05 #132B05

monochromatic

#06031B #06031B #0A052B #170B62 #241299

Accessibility & contrast

On white

19.64

#0A052B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.07

#0A052B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #0A052B

19.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##0A052B	#FFFFFF	#000000	##FFFFFF
##0A052B	1.00	19.64	1.07	19.64
#FFFFFF	19.64	1.00	21.00	1.00
#000000	1.07	21.00	1.00	21.00
##FFFFFF	19.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#000D2C

Deuteranopia (green-blind)

#000A2A

Tritanopia (blue-blind)

#000F17

Achromatopsia (no color)

#0B0B0B

Design tokens & code

CSS

--color: #0a052b;
/* rgb */ color: rgb(10, 5, 43);
/* oklch */ color: oklch(15.9% 0.074 281.0);

Tailwind

colors: {
  custom: {
    50: '#4c4964',
    500: '#0a052b',
    950: '#000000',
  },
}

SCSS

$custom: #0a052b;
$custom-light: #4c4964;
$custom-dark: #000000;

JSON

{
  "hex": "#0a052b",
  "rgb": {
    "r": 10,
    "g": 5,
    "b": 43
  },
  "hsl": {
    "h": 247.895,
    "s": 79.167,
    "l": 9.412
  },
  "oklch": {
    "l": 0.15909,
    "c": 0.0739,
    "h": 281
  },
  "luminance": 0.00347
}

Semantic roles & 50–950 ramp

primary

#0A052B

secondary

#626D1F

accent

#F632DC

background

#F4F4F6

surface

#E7E6EB

border

#C3C2C6

text

#010005

muted

#77777A

Preview Lab

Preview with #0A052B

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

Preview Lab → · Contrast checker → · Palette generator →