#15307B#15307B

#15307B is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.1% C 0.132 H 264.9°. Best body text is #FFFFFF at 12.06:1 contrast (WCAG AA passes).

Color values

HEX	#15307B
RGB	rgb(21, 48, 123)
HSL	hsl(224, 71%, 28%)
HSV	hsv(224, 83%, 48%)
CMYK	cmyk(82.9%, 61%, 0%, 51.8%)
CIE-LAB	lab(22.66, 19.94, -45.47)
CIE-LCH	lch(22.66, 49.65, 293.68°)
OKLab	oklab(34.07% -0.0116 -0.1314)
OKLCH	oklch(34.07% 0.132 264.9)
XYZ	xyz(4.9401, 3.7028, 19.1894)
Luminance	0.0370 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#15307B #7B6015

analogous

#15637B #15307B #2D157B

triadic

#15307B #7B1530 #307B15

tetradic

#15307B #7B1563 #7B6015 #157B2D

square

#15307B #7B1563 #7B6015 #157B2D

split-complementary

#15307B #7B2D15 #637B15

monochromatic

#040A1A #0C1C47 #15307B #1E44AF #2F5DDB

Accessibility & contrast

On white

12.06

#15307B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#15307B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #15307B

12.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##15307B	#FFFFFF	#000000	##FFFFFF
##15307B	1.00	12.06	1.74	12.06
#FFFFFF	12.06	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B7E

Deuteranopia (green-blind)

#00327A

Tritanopia (blue-blind)

#004350

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #15307b;
/* rgb */ color: rgb(21, 48, 123);
/* oklch */ color: oklch(34.1% 0.132 264.9);

Tailwind

colors: {
  custom: {
    50: '#6567a2',
    500: '#15307b',
    950: '#000000',
  },
}

SCSS

$custom: #15307b;
$custom-light: #6567a2;
$custom-dark: #000000;

JSON

{
  "hex": "#15307b",
  "rgb": {
    "r": 21,
    "g": 48,
    "b": 123
  },
  "hsl": {
    "h": 224.118,
    "s": 70.833,
    "l": 28.235
  },
  "oklch": {
    "l": 0.34067,
    "c": 0.13192,
    "h": 264.9
  },
  "luminance": 0.03703
}

Semantic roles & 50–950 ramp

primary

#15307B

secondary

#B0913B

accent

#BE3AEE

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #15307B

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

Preview Lab → · Contrast checker → · Palette generator →