#10284B#10284B

#10284B is a dark, moderate blue. Relative luminance 0.021; OKLCH L 27.9% C 0.071 H 258.0°. Best body text is #FFFFFF at 14.71:1 contrast (WCAG AA passes).

Color values

HEX	#10284B
RGB	rgb(16, 40, 75)
HSL	hsl(216, 65%, 18%)
HSV	hsv(216, 79%, 29%)
CMYK	cmyk(78.7%, 46.7%, 0%, 70.6%)
CIE-LAB	lab(16.18, 4.68, -24.44)
CIE-LCH	lch(16.18, 24.88, 280.83°)
OKLab	oklab(27.88% -0.0148 -0.0698)
OKLCH	oklch(27.88% 0.071 258)
XYZ	xyz(2.2420, 2.1355, 6.9493)
Luminance	0.0214 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10284B #4B3310

analogous

#10454B #10284B #15104B

triadic

#10284B #4B1028 #284B10

tetradic

#10284B #4B1045 #4B3310 #104B15

square

#10284B #4B1045 #4B3310 #104B15

split-complementary

#10284B #4B1510 #454B10

monochromatic

#050D19 #050D19 #10284B #1B437D #265EB0

Accessibility & contrast

On white

14.71

#10284B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.43

#10284B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10284B

14.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10284B	#FFFFFF	#000000	##FFFFFF
##10284B	1.00	14.71	1.43	14.71
#FFFFFF	14.71	1.00	21.00	1.00
#000000	1.43	21.00	1.00	21.00
##FFFFFF	14.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#172B4C

Deuteranopia (green-blind)

#0D264A

Tritanopia (blue-blind)

#003035

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #10284b;
/* rgb */ color: rgb(16, 40, 75);
/* oklch */ color: oklch(27.9% 0.071 258.0);

Tailwind

colors: {
  custom: {
    50: '#57617d',
    500: '#10284b',
    950: '#000000',
  },
}

SCSS

$custom: #10284b;
$custom-light: #57617d;
$custom-dark: #000000;

JSON

{
  "hex": "#10284b",
  "rgb": {
    "r": 16,
    "g": 40,
    "b": 75
  },
  "hsl": {
    "h": 215.593,
    "s": 64.835,
    "l": 17.843
  },
  "oklch": {
    "l": 0.27877,
    "c": 0.07138,
    "h": 258
  },
  "luminance": 0.02136
}

Semantic roles & 50–950 ramp

primary

#10284B

secondary

#856332

accent

#A440E8

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#030509

muted

#78797B

Preview Lab

Preview with #10284B

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

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