#1C378D#1C378D

#1C378D is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.5% C 0.146 H 266.0°. Best body text is #FFFFFF at 10.60:1 contrast (WCAG AA passes).

Color values

HEX	#1C378D
RGB	rgb(28, 55, 141)
HSL	hsl(226, 67%, 33%)
HSV	hsv(226, 80%, 55%)
CMYK	cmyk(80.1%, 61%, 0%, 44.7%)
CIE-LAB	lab(26.45, 23.06, -50.55)
CIE-LCH	lch(26.45, 55.56, 294.52°)
OKLab	oklab(37.46% -0.0101 -0.1461)
OKLCH	oklch(37.46% 0.146 266)
XYZ	xyz(6.6511, 4.9016, 25.7897)
Luminance	0.0490 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C378D #8D721C

analogous

#1C6F8D #1C378D #3A1C8D

triadic

#1C378D #8D1C37 #378D1C

tetradic

#1C378D #8D1C6F #8D721C #1C8D3A

square

#1C378D #8D1C6F #8D721C #1C8D3A

split-complementary

#1C378D #8D3A1C #6F8D1C

monochromatic

#080F27 #12235A #1C378D #264BC0 #496CDB

Accessibility & contrast

On white

10.60

#1C378D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#1C378D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C378D

10.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C378D	#FFFFFF	#000000	##FFFFFF
##1C378D	1.00	10.60	1.98	10.60
#FFFFFF	10.60	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004490

Deuteranopia (green-blind)

#00398B

Tritanopia (blue-blind)

#004D5C

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1c378d;
/* rgb */ color: rgb(28, 55, 141);
/* oklch */ color: oklch(37.5% 0.146 266.0);

Tailwind

colors: {
  custom: {
    50: '#6c6daf',
    500: '#1c378d',
    950: '#000000',
  },
}

SCSS

$custom: #1c378d;
$custom-light: #6c6daf;
$custom-dark: #000000;

JSON

{
  "hex": "#1c378d",
  "rgb": {
    "r": 28,
    "g": 55,
    "b": 141
  },
  "hsl": {
    "h": 225.664,
    "s": 66.864,
    "l": 33.137
  },
  "oklch": {
    "l": 0.37461,
    "c": 0.14644,
    "h": 266
  },
  "luminance": 0.04902
}

Semantic roles & 50–950 ramp

primary

#1C378D

secondary

#BDA148

accent

#C13EEA

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #1C378D

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

Preview Lab → · Contrast checker → · Palette generator →