#10388D#10388D

#10388D is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.3% C 0.148 H 262.6°. Best body text is #FFFFFF at 10.65:1 contrast (WCAG AA passes).

Color values

HEX	#10388D
RGB	rgb(16, 56, 141)
HSL	hsl(221, 80%, 31%)
HSV	hsv(221, 89%, 55%)
CMYK	cmyk(88.7%, 60.3%, 0%, 44.7%)
CIE-LAB	lab(26.33, 21.30, -50.76)
CIE-LCH	lch(26.33, 55.05, 292.76°)
OKLab	oklab(37.26% -0.019 -0.1469)
OKLCH	oklch(37.26% 0.148 262.6)
XYZ	xyz(6.4338, 4.8608, 25.7933)
Luminance	0.0486 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10388D #8D6510

analogous

#10768D #10388D #26108D

triadic

#10388D #8D1038 #388D10

tetradic

#10388D #8D1076 #8D6510 #108D26

square

#10388D #8D1076 #8D6510 #108D26

split-complementary

#10388D #8D2610 #768D10

monochromatic

#040C1F #0A2256 #10388D #164EC4 #306BE7

Accessibility & contrast

On white

10.65

#10388D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#10388D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10388D

10.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10388D	#FFFFFF	#000000	##FFFFFF
##10388D	1.00	10.65	1.97	10.65
#FFFFFF	10.65	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004490

Deuteranopia (green-blind)

#00398B

Tritanopia (blue-blind)

#004E5D

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #10388d;
/* rgb */ color: rgb(16, 56, 141);
/* oklch */ color: oklch(37.3% 0.148 262.6);

Tailwind

colors: {
  custom: {
    50: '#696eaf',
    500: '#10388d',
    950: '#000000',
  },
}

SCSS

$custom: #10388d;
$custom-light: #696eaf;
$custom-dark: #000000;

JSON

{
  "hex": "#10388d",
  "rgb": {
    "r": 16,
    "g": 56,
    "b": 141
  },
  "hsl": {
    "h": 220.8,
    "s": 79.618,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37261,
    "c": 0.1481,
    "h": 262.6
  },
  "luminance": 0.04862
}

Semantic roles & 50–950 ramp

primary

#10388D

secondary

#C29537

accent

#B732F6

background

#F6F6FA

surface

#ECEBF5

border

#C7C6CF

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #10388D

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

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