#10337F#10337F

#10337F is a dark, vivid blue. Relative luminance 0.040; OKLCH L 34.9% C 0.135 H 262.8°. Best body text is #FFFFFF at 11.65:1 contrast (WCAG AA passes).

Color values

HEX	#10337F
RGB	rgb(16, 51, 127)
HSL	hsl(221, 78%, 28%)
HSV	hsv(221, 87%, 50%)
CMYK	cmyk(87.4%, 59.8%, 0%, 50.2%)
CIE-LAB	lab(23.70, 19.01, -46.31)
CIE-LCH	lch(23.70, 50.06, 292.31°)
OKLab	oklab(34.91% -0.0169 -0.1339)
OKLCH	oklch(34.91% 0.135 262.8)
XYZ	xyz(5.2269, 4.0095, 20.5730)
Luminance	0.0401 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10337F #7F5C10

analogous

#106A7F #10337F #24107F

triadic

#10337F #7F1033 #337F10

tetradic

#10337F #7F106A #7F5C10 #107F24

square

#10337F #7F106A #7F5C10 #107F24

split-complementary

#10337F #7F2410 #6A7F10

monochromatic

#030B1B #091D49 #10337F #1749B5 #2662E4

Accessibility & contrast

On white

11.65

#10337F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#10337F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10337F

11.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10337F	#FFFFFF	#000000	##FFFFFF
##10337F	1.00	11.65	1.80	11.65
#FFFFFF	11.65	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E82

Deuteranopia (green-blind)

#00347E

Tritanopia (blue-blind)

#004653

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #10337f;
/* rgb */ color: rgb(16, 51, 127);
/* oklch */ color: oklch(34.9% 0.135 262.8);

Tailwind

colors: {
  custom: {
    50: '#656aa5',
    500: '#10337f',
    950: '#000000',
  },
}

SCSS

$custom: #10337f;
$custom-light: #656aa5;
$custom-dark: #000000;

JSON

{
  "hex": "#10337f",
  "rgb": {
    "r": 16,
    "g": 51,
    "b": 127
  },
  "hsl": {
    "h": 221.081,
    "s": 77.622,
    "l": 28.039
  },
  "oklch": {
    "l": 0.34907,
    "c": 0.13497,
    "h": 262.8
  },
  "luminance": 0.0401
}

Semantic roles & 50–950 ramp

primary

#10337F

secondary

#B58D36

accent

#B734F4

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #10337F

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

Preview Lab → · Contrast checker → · Palette generator →