#03133B#03133B

#03133B is a very dark, moderate blue. Relative luminance 0.008; OKLCH L 20.4% C 0.081 H 262.8°. Best body text is #FFFFFF at 18.10:1 contrast (WCAG AA passes).

Color values

HEX	#03133B
RGB	rgb(3, 19, 59)
HSL	hsl(223, 90%, 12%)
HSV	hsv(223, 95%, 23%)
CMYK	cmyk(94.9%, 67.8%, 0%, 76.9%)
CIE-LAB	lab(7.23, 11.56, -27.71)
CIE-LCH	lch(7.23, 30.02, 292.64°)
OKLab	oklab(20.43% -0.0102 -0.0803)
OKLCH	oklch(20.43% 0.081 262.8)
XYZ	xyz(1.0596, 0.8007, 4.2355)
Luminance	0.0080 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#03133B #3B2B03

analogous

#032F3B #03133B #0F033B

triadic

#03133B #3B0313 #133B03

tetradic

#03133B #3B032F #3B2B03 #033B0F

square

#03133B #3B032F #3B2B03 #033B0F

split-complementary

#03133B #3B0F03 #2F3B03

monochromatic

#01091D #01091D #03133B #062675 #0939AF

Accessibility & contrast

On white

18.10

#03133B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.16

#03133B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #03133B

18.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##03133B	#FFFFFF	#000000	##FFFFFF
##03133B	1.00	18.10	1.16	18.10
#FFFFFF	18.10	1.00	21.00	1.00
#000000	1.16	21.00	1.00	21.00
##FFFFFF	18.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00193C

Deuteranopia (green-blind)

#00133A

Tritanopia (blue-blind)

#001D24

Achromatopsia (no color)

#161616

Design tokens & code

CSS

--color: #03133b;
/* rgb */ color: rgb(3, 19, 59);
/* oklch */ color: oklch(20.4% 0.081 262.8);

Tailwind

colors: {
  custom: {
    50: '#4f5071',
    500: '#03133b',
    950: '#000000',
  },
}

SCSS

$custom: #03133b;
$custom-light: #4f5071;
$custom-dark: #000000;

JSON

{
  "hex": "#03133b",
  "rgb": {
    "r": 3,
    "g": 19,
    "b": 59
  },
  "hsl": {
    "h": 222.857,
    "s": 90.323,
    "l": 12.157
  },
  "oklch": {
    "l": 0.20426,
    "c": 0.08093,
    "h": 262.8
  },
  "luminance": 0.00801
}

Semantic roles & 50–950 ramp

primary

#03133B

secondary

#7E621C

accent

#C229FF

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020208

muted

#78787B

Preview Lab

Preview with #03133B

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

Preview Lab → · Contrast checker → · Palette generator →