#10378D#10378D

#10378D is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.1% C 0.149 H 262.9°. Best body text is #FFFFFF at 10.75:1 contrast (WCAG AA passes).

Color values

HEX	#10378D
RGB	rgb(16, 55, 141)
HSL	hsl(221, 80%, 31%)
HSV	hsv(221, 89%, 55%)
CMYK	cmyk(88.7%, 61%, 0%, 44.7%)
CIE-LAB	lab(26.05, 22.00, -51.22)
CIE-LCH	lch(26.05, 55.74, 293.24°)
OKLab	oklab(37.05% -0.0185 -0.1482)
OKLCH	oklch(37.05% 0.149 262.9)
XYZ	xyz(6.3859, 4.7648, 25.7773)
Luminance	0.0477 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10378D #8D6610

analogous

#10758D #10378D #27108D

triadic

#10378D #8D1037 #378D10

tetradic

#10378D #8D1075 #8D6610 #108D27

square

#10378D #8D1075 #8D6610 #108D27

split-complementary

#10378D #8D2710 #758D10

monochromatic

#040C1F #0A2256 #10378D #164CC4 #3069E7

Accessibility & contrast

On white

10.75

#10378D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#10378D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10378D

10.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10378D	#FFFFFF	#000000	##FFFFFF
##10378D	1.00	10.75	1.95	10.75
#FFFFFF	10.75	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004490

Deuteranopia (green-blind)

#00388B

Tritanopia (blue-blind)

#004D5C

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #10378d;
/* rgb */ color: rgb(16, 55, 141);
/* oklch */ color: oklch(37.1% 0.149 262.9);

Tailwind

colors: {
  custom: {
    50: '#696daf',
    500: '#10378d',
    950: '#000000',
  },
}

SCSS

$custom: #10378d;
$custom-light: #696daf;
$custom-dark: #000000;

JSON

{
  "hex": "#10378d",
  "rgb": {
    "r": 16,
    "g": 55,
    "b": 141
  },
  "hsl": {
    "h": 221.28,
    "s": 79.618,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37051,
    "c": 0.14938,
    "h": 262.9
  },
  "luminance": 0.04766
}

Semantic roles & 50–950 ramp

primary

#10378D

secondary

#C29637

accent

#B932F6

background

#F6F6FA

surface

#ECEBF5

border

#C7C6CF

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #10378D

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

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