#15378A#15378A

#15378A is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.9% C 0.144 H 263.8°. Best body text is #FFFFFF at 10.79:1 contrast (WCAG AA passes).

Color values

HEX	#15378A
RGB	rgb(21, 55, 138)
HSL	hsl(223, 74%, 31%)
HSV	hsv(223, 85%, 54%)
CMYK	cmyk(84.8%, 60.1%, 0%, 45.9%)
CIE-LAB	lab(25.94, 21.16, -49.54)
CIE-LCH	lch(25.94, 53.87, 293.13°)
OKLab	oklab(36.93% -0.0155 -0.1432)
OKLCH	oklch(36.93% 0.144 263.8)
XYZ	xyz(6.2613, 4.7260, 24.6220)
Luminance	0.0473 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#15378A #8A6815

analogous

#15718A #15378A #2D158A

triadic

#15378A #8A1537 #378A15

tetradic

#15378A #8A1571 #8A6815 #158A2D

square

#15378A #8A1571 #8A6815 #158A2D

split-complementary

#15378A #8A2D15 #718A15

monochromatic

#050D20 #0D2255 #15378A #1D4CBF #3969E1

Accessibility & contrast

On white

10.79

#15378A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#15378A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #15378A

10.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##15378A	#FFFFFF	#000000	##FFFFFF
##15378A	1.00	10.79	1.95	10.79
#FFFFFF	10.79	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00438D

Deuteranopia (green-blind)

#003888

Tritanopia (blue-blind)

#004C5B

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #15378a;
/* rgb */ color: rgb(21, 55, 138);
/* oklch */ color: oklch(36.9% 0.144 263.8);

Tailwind

colors: {
  custom: {
    50: '#696dad',
    500: '#15378a',
    950: '#000000',
  },
}

SCSS

$custom: #15378a;
$custom-light: #696dad;
$custom-dark: #000000;

JSON

{
  "hex": "#15378a",
  "rgb": {
    "r": 21,
    "g": 55,
    "b": 138
  },
  "hsl": {
    "h": 222.564,
    "s": 73.585,
    "l": 31.176
  },
  "oklch": {
    "l": 0.36926,
    "c": 0.14407,
    "h": 263.8
  },
  "luminance": 0.04727
}

Semantic roles & 50–950 ramp

primary

#15378A

secondary

#BE983D

accent

#BB38F0

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #15378A

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

Preview Lab → · Contrast checker → · Palette generator →