#10308D#10308D

#10308D is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.6% C 0.158 H 264.6°. Best body text is #FFFFFF at 11.48:1 contrast (WCAG AA passes).

Color values

HEX	#10308D
RGB	rgb(16, 48, 141)
HSL	hsl(225, 80%, 31%)
HSV	hsv(225, 89%, 55%)
CMYK	cmyk(88.7%, 66%, 0%, 44.7%)
CIE-LAB	lab(24.15, 26.87, -54.34)
CIE-LCH	lch(24.15, 60.62, 296.31°)
OKLab	oklab(35.63% -0.0149 -0.1575)
OKLCH	oklch(35.63% 0.158 264.6)
XYZ	xyz(6.0767, 4.1464, 25.6742)
Luminance	0.0415 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10308D #8D6D10

analogous

#106E8D #10308D #2E108D

triadic

#10308D #8D1030 #308D10

tetradic

#10308D #8D106E #8D6D10 #108D2E

square

#10308D #8D106E #8D6D10 #108D2E

split-complementary

#10308D #8D2E10 #6E8D10

monochromatic

#040B1F #0A1D56 #10308D #1643C4 #305FE7

Accessibility & contrast

On white

11.48

#10308D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#10308D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10308D

11.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10308D	#FFFFFF	#000000	##FFFFFF
##10308D	1.00	11.48	1.83	11.48
#FFFFFF	11.48	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F90

Deuteranopia (green-blind)

#00348B

Tritanopia (blue-blind)

#00495A

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #10308d;
/* rgb */ color: rgb(16, 48, 141);
/* oklch */ color: oklch(35.6% 0.158 264.6);

Tailwind

colors: {
  custom: {
    50: '#6968af',
    500: '#10308d',
    950: '#000000',
  },
}

SCSS

$custom: #10308d;
$custom-light: #6968af;
$custom-dark: #000000;

JSON

{
  "hex": "#10308d",
  "rgb": {
    "r": 16,
    "g": 48,
    "b": 141
  },
  "hsl": {
    "h": 224.64,
    "s": 79.618,
    "l": 30.784
  },
  "oklch": {
    "l": 0.35634,
    "c": 0.15816,
    "h": 264.6
  },
  "luminance": 0.04147
}

Semantic roles & 50–950 ramp

primary

#10308D

secondary

#C29E37

accent

#C432F6

background

#F6F6FA

surface

#ECEBF5

border

#C7C6CF

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #10308D

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

Preview Lab → · Contrast checker → · Palette generator →