#1C3B8A#1C3B8A

#1C3B8A is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.0% C 0.137 H 264.5°. Best body text is #FFFFFF at 10.28:1 contrast (WCAG AA passes).

Color values

HEX	#1C3B8A
RGB	rgb(28, 59, 138)
HSL	hsl(223, 66%, 33%)
HSV	hsv(223, 80%, 54%)
CMYK	cmyk(79.7%, 57.2%, 0%, 45.9%)
CIE-LAB	lab(27.32, 19.08, -47.28)
CIE-LCH	lch(27.32, 50.98, 291.98°)
OKLab	oklab(38.04% -0.0131 -0.1364)
OKLCH	oklch(38.04% 0.137 264.5)
XYZ	xyz(6.6287, 5.2090, 24.6959)
Luminance	0.0521 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3B8A #8A6B1C

analogous

#1C728A #1C3B8A #341C8A

triadic

#1C3B8A #8A1C3B #3B8A1C

tetradic

#1C3B8A #8A1C72 #8A6B1C #1C8A34

square

#1C3B8A #8A1C72 #8A6B1C #1C8A34

split-complementary

#1C3B8A #8A341C #728A1C

monochromatic

#070F24 #122557 #1C3B8A #2651BD #4770DA

Accessibility & contrast

On white

10.28

#1C3B8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#1C3B8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3B8A

10.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3B8A	#FFFFFF	#000000	##FFFFFF
##1C3B8A	1.00	10.28	2.04	10.28
#FFFFFF	10.28	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468D

Deuteranopia (green-blind)

#003C88

Tritanopia (blue-blind)

#004F5C

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1c3b8a;
/* rgb */ color: rgb(28, 59, 138);
/* oklch */ color: oklch(38.0% 0.137 264.5);

Tailwind

colors: {
  custom: {
    50: '#6b70ad',
    500: '#1c3b8a',
    950: '#000000',
  },
}

SCSS

$custom: #1c3b8a;
$custom-light: #6b70ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3b8a",
  "rgb": {
    "r": 28,
    "g": 59,
    "b": 138
  },
  "hsl": {
    "h": 223.091,
    "s": 66.265,
    "l": 32.549
  },
  "oklch": {
    "l": 0.38036,
    "c": 0.13703,
    "h": 264.5
  },
  "luminance": 0.0521
}

Semantic roles & 50–950 ramp

primary

#1C3B8A

secondary

#BB9A46

accent

#B93FE9

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1C3B8A

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

Preview Lab → · Contrast checker → · Palette generator →