#15337B#15337B

#15337B is a dark, vivid blue. Relative luminance 0.040; OKLCH L 34.7% C 0.128 H 263.8°. Best body text is #FFFFFF at 11.72:1 contrast (WCAG AA passes).

Color values

HEX	#15337B
RGB	rgb(21, 51, 123)
HSL	hsl(222, 71%, 28%)
HSV	hsv(222, 83%, 48%)
CMYK	cmyk(82.9%, 58.5%, 0%, 51.8%)
CIE-LAB	lab(23.53, 17.80, -44.06)
CIE-LCH	lch(23.53, 47.53, 292.00°)
OKLab	oklab(34.72% -0.0137 -0.1272)
OKLCH	oklch(34.72% 0.128 263.8)
XYZ	xyz(5.0670, 3.9565, 19.2317)
Luminance	0.0396 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#15337B #7B5D15

analogous

#15667B #15337B #2A157B

triadic

#15337B #7B1533 #337B15

tetradic

#15337B #7B1566 #7B5D15 #157B2A

square

#15337B #7B1566 #7B5D15 #157B2A

split-complementary

#15337B #7B2A15 #667B15

monochromatic

#040B1A #0C1D47 #15337B #1E49AF #2F62DB

Accessibility & contrast

On white

11.72

#15337B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#15337B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #15337B

11.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##15337B	#FFFFFF	#000000	##FFFFFF
##15337B	1.00	11.72	1.79	11.72
#FFFFFF	11.72	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D7D

Deuteranopia (green-blind)

#00347A

Tritanopia (blue-blind)

#004551

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #15337b;
/* rgb */ color: rgb(21, 51, 123);
/* oklch */ color: oklch(34.7% 0.128 263.8);

Tailwind

colors: {
  custom: {
    50: '#656aa2',
    500: '#15337b',
    950: '#000000',
  },
}

SCSS

$custom: #15337b;
$custom-light: #656aa2;
$custom-dark: #000000;

JSON

{
  "hex": "#15337b",
  "rgb": {
    "r": 21,
    "g": 51,
    "b": 123
  },
  "hsl": {
    "h": 222.353,
    "s": 70.833,
    "l": 28.235
  },
  "oklch": {
    "l": 0.34716,
    "c": 0.12797,
    "h": 263.8
  },
  "luminance": 0.03957
}

Semantic roles & 50–950 ramp

primary

#15337B

secondary

#B08E3B

accent

#B93AEE

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #15337B

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

Preview Lab → · Contrast checker → · Palette generator →