#1C3383#1C3383

#1C3383 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.7% C 0.137 H 266.8°. Best body text is #FFFFFF at 11.35:1 contrast (WCAG AA passes).

Color values

HEX	#1C3383
RGB	rgb(28, 51, 131)
HSL	hsl(227, 65%, 31%)
HSV	hsv(227, 79%, 51%)
CMYK	cmyk(78.6%, 61.1%, 0%, 48.6%)
CIE-LAB	lab(24.49, 21.85, -47.52)
CIE-LCH	lch(24.49, 52.31, 294.69°)
OKLab	oklab(35.73% -0.0076 -0.1373)
OKLCH	oklch(35.73% 0.137 266.8)
XYZ	xyz(5.7580, 4.2526, 21.9857)
Luminance	0.0425 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3383 #836C1C

analogous

#1C6683 #1C3383 #381C83

triadic

#1C3383 #831C33 #33831C

tetradic

#1C3383 #831C66 #836C1C #1C8338

square

#1C3383 #831C66 #836C1C #1C8338

split-complementary

#1C3383 #83381C #66831C

monochromatic

#060C1E #111F51 #1C3383 #2747B5 #4364D7

Accessibility & contrast

On white

11.35

#1C3383 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#1C3383 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3383

11.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3383	#FFFFFF	#000000	##FFFFFF
##1C3383	1.00	11.35	1.85	11.35
#FFFFFF	11.35	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F86

Deuteranopia (green-blind)

#003681

Tritanopia (blue-blind)

#004755

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1c3383;
/* rgb */ color: rgb(28, 51, 131);
/* oklch */ color: oklch(35.7% 0.137 266.8);

Tailwind

colors: {
  custom: {
    50: '#696aa8',
    500: '#1c3383',
    950: '#000000',
  },
}

SCSS

$custom: #1c3383;
$custom-light: #696aa8;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3383",
  "rgb": {
    "r": 28,
    "g": 51,
    "b": 131
  },
  "hsl": {
    "h": 226.602,
    "s": 64.78,
    "l": 31.176
  },
  "oklch": {
    "l": 0.35728,
    "c": 0.13747,
    "h": 266.8
  },
  "luminance": 0.04253
}

Semantic roles & 50–950 ramp

primary

#1C3383

secondary

#B69D45

accent

#C240E8

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #1C3383

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

Preview Lab → · Contrast checker → · Palette generator →