#04253B#04253B

#04253B is a dark, muted cyan. Relative luminance 0.017; OKLCH L 25.4% C 0.056 H 242.7°. Best body text is #FFFFFF at 15.75:1 contrast (WCAG AA passes).

Color values

HEX	#04253B
RGB	rgb(4, 37, 59)
HSL	hsl(204, 87%, 12%)
HSV	hsv(204, 93%, 23%)
CMYK	cmyk(93.2%, 37.3%, 0%, 76.9%)
CIE-LAB	lab(13.62, -2.23, -17.46)
CIE-LCH	lch(13.62, 17.60, 262.73°)
OKLab	oklab(25.4% -0.0256 -0.0496)
OKLCH	oklch(25.4% 0.056 242.7)
XYZ	xyz(1.5007, 1.6645, 4.3790)
Luminance	0.0167 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04253B #3B1A04

analogous

#043B36 #04253B #04093B

triadic

#04253B #3B0425 #253B04

tetradic

#04253B #36043B #3B1A04 #093B04

square

#04253B #36043B #3B1A04 #093B04

split-complementary

#04253B #3B0409 #3B3604

monochromatic

#02121D #02121D #04253B #084974 #0C6DAE

Accessibility & contrast

On white

15.75

#04253B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#04253B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04253B

15.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04253B	#FFFFFF	#000000	##FFFFFF
##04253B	1.00	15.75	1.33	15.75
#FFFFFF	15.75	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B263C

Deuteranopia (green-blind)

#13213B

Tritanopia (blue-blind)

#002A2D

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #04253b;
/* rgb */ color: rgb(4, 37, 59);
/* oklch */ color: oklch(25.4% 0.056 242.7);

Tailwind

colors: {
  custom: {
    50: '#4f5f71',
    500: '#04253b',
    950: '#000000',
  },
}

SCSS

$custom: #04253b;
$custom-light: #4f5f71;
$custom-dark: #000000;

JSON

{
  "hex": "#04253b",
  "rgb": {
    "r": 4,
    "g": 37,
    "b": 59
  },
  "hsl": {
    "h": 204,
    "s": 87.302,
    "l": 12.353
  },
  "oklch": {
    "l": 0.25399,
    "c": 0.05581,
    "h": 242.7
  },
  "luminance": 0.01665
}

Semantic roles & 50–950 ramp

primary

#04253B

secondary

#7D441E

accent

#7F2AFD

background

#F4F5F6

surface

#E7E9EC

border

#C3C5C7

text

#020407

muted

#78797A

Preview Lab

Preview with #04253B

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

Preview Lab → · Contrast checker → · Palette generator →