#10387F#10387F

#10387F is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.0% C 0.128 H 261.0°. Best body text is #FFFFFF at 11.09:1 contrast (WCAG AA passes).

Color values

HEX	#10387F
RGB	rgb(16, 56, 127)
HSL	hsl(218, 78%, 28%)
HSV	hsv(218, 87%, 50%)
CMYK	cmyk(87.4%, 55.9%, 0%, 50.2%)
CIE-LAB	lab(25.17, 15.44, -43.93)
CIE-LCH	lch(25.17, 46.56, 289.37°)
OKLab	oklab(36.02% -0.0202 -0.1268)
OKLCH	oklch(36.02% 0.128 261)
XYZ	xyz(5.4572, 4.4701, 20.6498)
Luminance	0.0447 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10387F #7F5710

analogous

#106F7F #10387F #1F107F

triadic

#10387F #7F1038 #387F10

tetradic

#10387F #7F106F #7F5710 #107F1F

square

#10387F #7F106F #7F5710 #107F1F

split-complementary

#10387F #7F1F10 #6F7F10

monochromatic

#030C1B #092049 #10387F #1750B5 #266AE4

Accessibility & contrast

On white

11.09

#10387F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#10387F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10387F

11.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10387F	#FFFFFF	#000000	##FFFFFF
##10387F	1.00	11.09	1.89	11.09
#FFFFFF	11.09	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004181

Deuteranopia (green-blind)

#00377E

Tritanopia (blue-blind)

#004A55

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #10387f;
/* rgb */ color: rgb(16, 56, 127);
/* oklch */ color: oklch(36.0% 0.128 261.0);

Tailwind

colors: {
  custom: {
    50: '#656ea5',
    500: '#10387f',
    950: '#000000',
  },
}

SCSS

$custom: #10387f;
$custom-light: #656ea5;
$custom-dark: #000000;

JSON

{
  "hex": "#10387f",
  "rgb": {
    "r": 16,
    "g": 56,
    "b": 127
  },
  "hsl": {
    "h": 218.378,
    "s": 77.622,
    "l": 28.039
  },
  "oklch": {
    "l": 0.36016,
    "c": 0.12839,
    "h": 261
  },
  "luminance": 0.04471
}

Semantic roles & 50–950 ramp

primary

#10387F

secondary

#B58736

accent

#AF34F4

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #10387F

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

Preview Lab → · Contrast checker → · Palette generator →