#15357B#15357B

#15357B is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.2% C 0.125 H 263.0°. Best body text is #FFFFFF at 11.49:1 contrast (WCAG AA passes).

Color values

HEX	#15357B
RGB	rgb(21, 53, 123)
HSL	hsl(221, 71%, 28%)
HSV	hsv(221, 83%, 48%)
CMYK	cmyk(82.9%, 56.9%, 0%, 51.8%)
CIE-LAB	lab(24.11, 16.38, -43.11)
CIE-LCH	lch(24.11, 46.12, 290.80°)
OKLab	oklab(35.16% -0.0152 -0.1244)
OKLCH	oklch(35.16% 0.125 263)
XYZ	xyz(5.1562, 4.1351, 19.2614)
Luminance	0.0414 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#15357B #7B5B15

analogous

#15687B #15357B #28157B

triadic

#15357B #7B1535 #357B15

tetradic

#15357B #7B1568 #7B5B15 #157B28

square

#15357B #7B1568 #7B5B15 #157B28

split-complementary

#15357B #7B2815 #687B15

monochromatic

#040B1A #0C1E47 #15357B #1E4CAF #2F65DB

Accessibility & contrast

On white

11.49

#15357B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#15357B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #15357B

11.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##15357B	#FFFFFF	#000000	##FFFFFF
##15357B	1.00	11.49	1.83	11.49
#FFFFFF	11.49	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E7D

Deuteranopia (green-blind)

#00357A

Tritanopia (blue-blind)

#004652

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #15357b;
/* rgb */ color: rgb(21, 53, 123);
/* oklch */ color: oklch(35.2% 0.125 263.0);

Tailwind

colors: {
  custom: {
    50: '#656ba2',
    500: '#15357b',
    950: '#000000',
  },
}

SCSS

$custom: #15357b;
$custom-light: #656ba2;
$custom-dark: #000000;

JSON

{
  "hex": "#15357b",
  "rgb": {
    "r": 21,
    "g": 53,
    "b": 123
  },
  "hsl": {
    "h": 221.176,
    "s": 70.833,
    "l": 28.235
  },
  "oklch": {
    "l": 0.35158,
    "c": 0.12531,
    "h": 263
  },
  "luminance": 0.04136
}

Semantic roles & 50–950 ramp

primary

#15357B

secondary

#B08C3B

accent

#B53AEE

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#06060F

muted

#7A7A7F

Preview Lab

Preview with #15357B

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

Preview Lab → · Contrast checker → · Palette generator →