#1C3C83#1C3C83

#1C3C83 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.7% C 0.126 H 263.3°. Best body text is #FFFFFF at 10.38:1 contrast (WCAG AA passes).

Color values

HEX	#1C3C83
RGB	rgb(28, 60, 131)
HSL	hsl(221, 65%, 31%)
HSV	hsv(221, 79%, 51%)
CMYK	cmyk(78.6%, 54.2%, 0%, 48.6%)
CIE-LAB	lab(27.06, 15.54, -43.34)
CIE-LCH	lch(27.06, 46.04, 289.73°)
OKLab	oklab(37.67% -0.0146 -0.1248)
OKLCH	oklch(37.67% 0.126 263.3)
XYZ	xyz(6.1900, 5.1166, 22.1297)
Luminance	0.0512 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3C83 #83631C

analogous

#1C6F83 #1C3C83 #2F1C83

triadic

#1C3C83 #831C3C #3C831C

tetradic

#1C3C83 #831C6F #83631C #1C832F

square

#1C3C83 #831C6F #83631C #1C832F

split-complementary

#1C3C83 #832F1C #6F831C

monochromatic

#060E1E #112551 #1C3C83 #2753B5 #4371D7

Accessibility & contrast

On white

10.38

#1C3C83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#1C3C83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3C83

10.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3C83	#FFFFFF	#000000	##FFFFFF
##1C3C83	1.00	10.38	2.02	10.38
#FFFFFF	10.38	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#094586

Deuteranopia (green-blind)

#003B82

Tritanopia (blue-blind)

#004D59

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1c3c83;
/* rgb */ color: rgb(28, 60, 131);
/* oklch */ color: oklch(37.7% 0.126 263.3);

Tailwind

colors: {
  custom: {
    50: '#6971a8',
    500: '#1c3c83',
    950: '#000000',
  },
}

SCSS

$custom: #1c3c83;
$custom-light: #6971a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3c83",
  "rgb": {
    "r": 28,
    "g": 60,
    "b": 131
  },
  "hsl": {
    "h": 221.359,
    "s": 64.78,
    "l": 31.176
  },
  "oklch": {
    "l": 0.37668,
    "c": 0.12566,
    "h": 263.3
  },
  "luminance": 0.05117
}

Semantic roles & 50–950 ramp

primary

#1C3C83

secondary

#B69345

accent

#B440E8

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1C3C83

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

Preview Lab → · Contrast checker → · Palette generator →