#04303B#04303B

#04303B is a dark, muted cyan. Relative luminance 0.025; OKLCH L 28.7% C 0.049 H 219.3°. Best body text is #FFFFFF at 14.08:1 contrast (WCAG AA passes).

Color values

HEX	#04303B
RGB	rgb(4, 48, 59)
HSL	hsl(192, 87%, 12%)
HSV	hsv(192, 93%, 23%)
CMYK	cmyk(93.2%, 18.6%, 0%, 76.9%)
CIE-LAB	lab(17.71, -9.72, -11.07)
CIE-LCH	lch(17.71, 14.73, 228.74°)
OKLab	oklab(28.67% -0.0379 -0.031)
OKLCH	oklch(28.67% 0.049 219.3)
XYZ	xyz(1.8961, 2.4552, 4.5108)
Luminance	0.0245 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04303B #3B0F04

analogous

#043B2B #04303B #04153B

triadic

#04303B #3B0430 #303B04

tetradic

#04303B #2B043B #3B0F04 #153B04

square

#04303B #2B043B #3B0F04 #153B04

split-complementary

#04303B #3B0415 #3B2B04

monochromatic

#02171D #02171D #04303B #085F74 #0C8DAE

Accessibility & contrast

On white

14.08

#04303B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.49

#04303B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04303B

14.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04303B	#FFFFFF	#000000	##FFFFFF
##04303B	1.00	14.08	1.49	14.08
#FFFFFF	14.08	1.00	21.00	1.00
#000000	1.49	21.00	1.00	21.00
##FFFFFF	14.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#292E3C

Deuteranopia (green-blind)

#22293B

Tritanopia (blue-blind)

#003434

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #04303b;
/* rgb */ color: rgb(4, 48, 59);
/* oklch */ color: oklch(28.7% 0.049 219.3);

Tailwind

colors: {
  custom: {
    50: '#506871',
    500: '#04303b',
    950: '#000000',
  },
}

SCSS

$custom: #04303b;
$custom-light: #506871;
$custom-dark: #000000;

JSON

{
  "hex": "#04303b",
  "rgb": {
    "r": 4,
    "g": 48,
    "b": 59
  },
  "hsl": {
    "h": 192,
    "s": 87.302,
    "l": 12.353
  },
  "oklch": {
    "l": 0.2867,
    "c": 0.04901,
    "h": 219.3
  },
  "luminance": 0.02455
}

Semantic roles & 50–950 ramp

primary

#04303B

secondary

#7D311E

accent

#552AFD

background

#F4F6F6

surface

#E7EBEC

border

#C3C6C7

text

#020607

muted

#787A7A

Preview Lab

Preview with #04303B

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

Preview Lab → · Contrast checker → · Palette generator →