#04153B#04153B

#04153B is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.0% C 0.077 H 262.3°. Best body text is #FFFFFF at 17.86:1 contrast (WCAG AA passes).

Color values

HEX	#04153B
RGB	rgb(4, 21, 59)
HSL	hsl(221, 87%, 12%)
HSV	hsv(221, 93%, 23%)
CMYK	cmyk(93.2%, 64.4%, 0%, 76.9%)
CIE-LAB	lab(7.93, 10.21, -26.57)
CIE-LCH	lch(7.93, 28.47, 291.01°)
OKLab	oklab(20.99% -0.0104 -0.0768)
OKLCH	oklch(20.99% 0.077 262.3)
XYZ	xyz(1.1074, 0.8778, 4.2479)
Luminance	0.0088 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#04153B #3B2A04

analogous

#04303B #04153B #0F043B

triadic

#04153B #3B0415 #153B04

tetradic

#04153B #3B0430 #3B2A04 #043B0F

square

#04153B #3B0430 #3B2A04 #043B0F

split-complementary

#04153B #3B0F04 #303B04

monochromatic

#020A1D #020A1D #04153B #082974 #0C3EAE

Accessibility & contrast

On white

17.86

#04153B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#04153B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #04153B

17.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##04153B	#FFFFFF	#000000	##FFFFFF
##04153B	1.00	17.86	1.18	17.86
#FFFFFF	17.86	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001A3C

Deuteranopia (green-blind)

#00153A

Tritanopia (blue-blind)

#001F25

Achromatopsia (no color)

#171717

Design tokens & code

CSS

--color: #04153b;
/* rgb */ color: rgb(4, 21, 59);
/* oklch */ color: oklch(21.0% 0.077 262.3);

Tailwind

colors: {
  custom: {
    50: '#4f5171',
    500: '#04153b',
    950: '#000000',
  },
}

SCSS

$custom: #04153b;
$custom-light: #4f5171;
$custom-dark: #000000;

JSON

{
  "hex": "#04153b",
  "rgb": {
    "r": 4,
    "g": 21,
    "b": 59
  },
  "hsl": {
    "h": 221.455,
    "s": 87.302,
    "l": 12.353
  },
  "oklch": {
    "l": 0.20987,
    "c": 0.07746,
    "h": 262.3
  },
  "luminance": 0.00878
}

Semantic roles & 50–950 ramp

primary

#04153B

secondary

#7D5F1E

accent

#BC2AFD

background

#F4F4F6

surface

#E7E7EC

border

#C3C3C7

text

#020208

muted

#78787B

Preview Lab

Preview with #04153B

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

Preview Lab → · Contrast checker → · Palette generator →