#15243B#15243B

#15243B is a dark, muted blue. Relative luminance 0.017; OKLCH L 25.9% C 0.048 H 258.7°. Best body text is #FFFFFF at 15.59:1 contrast (WCAG AA passes).

Color values

HEX	#15243B
RGB	rgb(21, 36, 59)
HSL	hsl(216, 48%, 16%)
HSV	hsv(216, 64%, 23%)
CMYK	cmyk(64.4%, 39%, 0%, 76.9%)
CIE-LAB	lab(14.04, 2.02, -16.74)
CIE-LCH	lch(14.04, 16.86, 276.89°)
OKLab	oklab(25.95% -0.0095 -0.0472)
OKLCH	oklch(25.95% 0.048 258.7)
XYZ	xyz(1.7293, 1.7368, 4.3809)
Luminance	0.0174 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#15243B #3B2C15

analogous

#15373B #15243B #19153B

triadic

#15243B #3B1524 #243B15

tetradic

#15243B #3B1537 #3B2C15 #153B19

square

#15243B #3B1537 #3B2C15 #153B19

split-complementary

#15243B #3B1915 #373B15

monochromatic

#080E17 #080E17 #15243B #254068 #355B95

Accessibility & contrast

On white

15.59

#15243B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#15243B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #15243B

15.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##15243B	#FFFFFF	#000000	##FFFFFF
##15243B	1.00	15.59	1.35	15.59
#FFFFFF	15.59	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B263C

Deuteranopia (green-blind)

#16223B

Tritanopia (blue-blind)

#01292C

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #15243b;
/* rgb */ color: rgb(21, 36, 59);
/* oklch */ color: oklch(25.9% 0.048 258.7);

Tailwind

colors: {
  custom: {
    50: '#565e71',
    500: '#15243b',
    950: '#000000',
  },
}

SCSS

$custom: #15243b;
$custom-light: #565e71;
$custom-dark: #000000;

JSON

{
  "hex": "#15243b",
  "rgb": {
    "r": 21,
    "g": 36,
    "b": 59
  },
  "hsl": {
    "h": 216.316,
    "s": 47.5,
    "l": 15.686
  },
  "oklch": {
    "l": 0.25948,
    "c": 0.04819,
    "h": 258.7
  },
  "luminance": 0.01737
}

Semantic roles & 50–950 ramp

primary

#15243B

secondary

#725C39

accent

#A251D7

background

#F5F5F6

surface

#E9E9EC

border

#C5C5C7

text

#030407

muted

#78797A

Preview Lab

Preview with #15243B

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

Preview Lab → · Contrast checker → · Palette generator →