#10378E#10378E

#10378E is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.1% C 0.151 H 263.0°. Best body text is #FFFFFF at 10.72:1 contrast (WCAG AA passes).

Color values

HEX	#10378E
RGB	rgb(16, 55, 142)
HSL	hsl(221, 80%, 31%)
HSV	hsv(221, 89%, 56%)
CMYK	cmyk(88.7%, 61.3%, 0%, 44.3%)
CIE-LAB	lab(26.14, 22.41, -51.69)
CIE-LCH	lch(26.14, 56.34, 293.44°)
OKLab	oklab(37.14% -0.0184 -0.1496)
OKLCH	oklch(37.14% 0.151 263)
XYZ	xyz(6.4606, 4.7947, 26.1709)
Luminance	0.0480 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#10378E #8E6710

analogous

#10768E #10378E #28108E

triadic

#10378E #8E1037 #378E10

tetradic

#10378E #8E1076 #8E6710 #108E28

square

#10378E #8E1076 #8E6710 #108E28

split-complementary

#10378E #8E2810 #768E10

monochromatic

#040C20 #0A2257 #10378E #164CC5 #3169E8

Accessibility & contrast

On white

10.72

#10378E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#10378E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #10378E

10.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##10378E	#FFFFFF	#000000	##FFFFFF
##10378E	1.00	10.72	1.96	10.72
#FFFFFF	10.72	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004491

Deuteranopia (green-blind)

#00388C

Tritanopia (blue-blind)

#004D5D

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #10378e;
/* rgb */ color: rgb(16, 55, 142);
/* oklch */ color: oklch(37.1% 0.151 263.0);

Tailwind

colors: {
  custom: {
    50: '#696db0',
    500: '#10378e',
    950: '#000000',
  },
}

SCSS

$custom: #10378e;
$custom-light: #696db0;
$custom-dark: #000000;

JSON

{
  "hex": "#10378e",
  "rgb": {
    "r": 16,
    "g": 55,
    "b": 142
  },
  "hsl": {
    "h": 221.429,
    "s": 79.747,
    "l": 30.98
  },
  "oklch": {
    "l": 0.37144,
    "c": 0.15075,
    "h": 263
  },
  "luminance": 0.04796
}

Semantic roles & 50–950 ramp

primary

#10378E

secondary

#C39737

accent

#B932F6

background

#F6F6FA

surface

#ECEBF5

border

#C7C6CF

text

#080711

muted

#7A7A80

Preview Lab

Preview with #10378E

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

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