#1C3183#1C3183

#1C3183 is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.3% C 0.140 H 267.5°. Best body text is #FFFFFF at 11.56:1 contrast (WCAG AA passes).

Color values

HEX	#1C3183
RGB	rgb(28, 49, 131)
HSL	hsl(228, 65%, 31%)
HSV	hsv(228, 79%, 51%)
CMYK	cmyk(78.6%, 62.6%, 0%, 48.6%)
CIE-LAB	lab(23.94, 23.24, -48.42)
CIE-LCH	lch(23.94, 53.71, 295.64°)
OKLab	oklab(35.32% -0.0062 -0.1399)
OKLCH	oklch(35.32% 0.14 267.5)
XYZ	xyz(5.6725, 4.0816, 21.9572)
Luminance	0.0408 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3183 #836E1C

analogous

#1C6483 #1C3183 #3A1C83

triadic

#1C3183 #831C31 #31831C

tetradic

#1C3183 #831C64 #836E1C #1C833A

square

#1C3183 #831C64 #836E1C #1C833A

split-complementary

#1C3183 #833A1C #64831C

monochromatic

#060B1E #111E51 #1C3183 #2744B5 #4361D7

Accessibility & contrast

On white

11.56

#1C3183 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#1C3183 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3183

11.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3183	#FFFFFF	#000000	##FFFFFF
##1C3183	1.00	11.56	1.82	11.56
#FFFFFF	11.56	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E86

Deuteranopia (green-blind)

#003481

Tritanopia (blue-blind)

#004655

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1c3183;
/* rgb */ color: rgb(28, 49, 131);
/* oklch */ color: oklch(35.3% 0.140 267.5);

Tailwind

colors: {
  custom: {
    50: '#6a68a8',
    500: '#1c3183',
    950: '#000000',
  },
}

SCSS

$custom: #1c3183;
$custom-light: #6a68a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3183",
  "rgb": {
    "r": 28,
    "g": 49,
    "b": 131
  },
  "hsl": {
    "h": 227.767,
    "s": 64.78,
    "l": 31.176
  },
  "oklch": {
    "l": 0.35319,
    "c": 0.14007,
    "h": 267.5
  },
  "luminance": 0.04082
}

Semantic roles & 50–950 ramp

primary

#1C3183

secondary

#B69F45

accent

#C640E8

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #1C3183

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

Preview Lab → · Contrast checker → · Palette generator →