#1C3A8A#1C3A8A

#1C3A8A is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.8% C 0.138 H 264.9°. Best body text is #FFFFFF at 10.39:1 contrast (WCAG AA passes).

Color values

HEX	#1C3A8A
RGB	rgb(28, 58, 138)
HSL	hsl(224, 66%, 33%)
HSV	hsv(224, 80%, 54%)
CMYK	cmyk(79.7%, 58%, 0%, 45.9%)
CIE-LAB	lab(27.04, 19.77, -47.74)
CIE-LCH	lch(27.04, 51.67, 292.50°)
OKLab	oklab(37.82% -0.0124 -0.1378)
OKLCH	oklch(37.82% 0.138 264.9)
XYZ	xyz(6.5778, 5.1072, 24.6789)
Luminance	0.0511 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3A8A #8A6C1C

analogous

#1C718A #1C3A8A #351C8A

triadic

#1C3A8A #8A1C3A #3A8A1C

tetradic

#1C3A8A #8A1C71 #8A6C1C #1C8A35

square

#1C3A8A #8A1C71 #8A6C1C #1C8A35

split-complementary

#1C3A8A #8A351C #718A1C

monochromatic

#070F24 #122557 #1C3A8A #264FBD #476FDA

Accessibility & contrast

On white

10.39

#1C3A8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#1C3A8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3A8A

10.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3A8A	#FFFFFF	#000000	##FFFFFF
##1C3A8A	1.00	10.39	2.02	10.39
#FFFFFF	10.39	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458D

Deuteranopia (green-blind)

#003B88

Tritanopia (blue-blind)

#004E5C

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1c3a8a;
/* rgb */ color: rgb(28, 58, 138);
/* oklch */ color: oklch(37.8% 0.138 264.9);

Tailwind

colors: {
  custom: {
    50: '#6b6fad',
    500: '#1c3a8a',
    950: '#000000',
  },
}

SCSS

$custom: #1c3a8a;
$custom-light: #6b6fad;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3a8a",
  "rgb": {
    "r": 28,
    "g": 58,
    "b": 138
  },
  "hsl": {
    "h": 223.636,
    "s": 66.265,
    "l": 32.549
  },
  "oklch": {
    "l": 0.37822,
    "c": 0.13834,
    "h": 264.9
  },
  "luminance": 0.05108
}

Semantic roles & 50–950 ramp

primary

#1C3A8A

secondary

#BB9B46

accent

#BB3FE9

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1C3A8A

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

Preview Lab → · Contrast checker → · Palette generator →