#10288D#10288D

#10288D is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.2% C 0.168 H 266.0°. Best body text is #FFFFFF at 12.28:1 contrast (WCAG AA passes).

Color values

HEX	#10288D
RGB	rgb(16, 40, 141)
HSL	hsl(228, 80%, 31%)
HSV	hsv(228, 89%, 55%)
CMYK	cmyk(88.7%, 71.6%, 0%, 44.7%)
CIE-LAB	lab(22.12, 32.28, -57.67)
CIE-LCH	lch(22.12, 66.09, 299.23°)
OKLab	oklab(34.15% -0.0117 -0.1672)
OKLCH	oklch(34.15% 0.168 266)
XYZ	xyz(5.7785, 3.5501, 25.5748)
Luminance	0.0355 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10288D #8D7510

analogous

#10668D #10288D #36108D

triadic

#10288D #8D1028 #288D10

tetradic

#10288D #8D1066 #8D7510 #108D36

square

#10288D #8D1066 #8D7510 #108D36

split-complementary

#10288D #8D3610 #668D10

monochromatic

#04091F #0A1856 #10288D #1638C4 #3053E7

Accessibility & contrast

On white

12.28

#10288D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#10288D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10288D

12.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10288D	#FFFFFF	#000000	##FFFFFF
##10288D	1.00	12.28	1.71	12.28
#FFFFFF	12.28	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B90

Deuteranopia (green-blind)

#002F8B

Tritanopia (blue-blind)

#004557

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #10288d;
/* rgb */ color: rgb(16, 40, 141);
/* oklch */ color: oklch(34.2% 0.168 266.0);

Tailwind

colors: {
  custom: {
    50: '#6a62af',
    500: '#10288d',
    950: '#000000',
  },
}

SCSS

$custom: #10288d;
$custom-light: #6a62af;
$custom-dark: #000000;

JSON

{
  "hex": "#10288d",
  "rgb": {
    "r": 16,
    "g": 40,
    "b": 141
  },
  "hsl": {
    "h": 228.48,
    "s": 79.618,
    "l": 30.784
  },
  "oklch": {
    "l": 0.34152,
    "c": 0.16763,
    "h": 266
  },
  "luminance": 0.03551
}

Semantic roles & 50–950 ramp

primary

#10288D

secondary

#C2A737

accent

#D032F6

background

#F7F5FA

surface

#EDEAF5

border

#C8C6CF

text

#080511

muted

#7B7980

Preview Lab

Preview with #10288D

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

Preview Lab → · Contrast checker → · Palette generator →