#1C3DB4#1C3DB4

#1C3DB4 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.3% C 0.191 H 265.9°. Best body text is #FFFFFF at 8.84:1 contrast (WCAG AA passes).

Color values

HEX	#1C3DB4
RGB	rgb(28, 61, 180)
HSL	hsl(227, 73%, 41%)
HSV	hsv(227, 84%, 71%)
CMYK	cmyk(84.4%, 66.1%, 0%, 29.4%)
CIE-LAB	lab(31.53, 34.15, -65.86)
CIE-LCH	lch(31.53, 74.19, 297.41°)
OKLab	oklab(42.3% -0.0138 -0.1908)
OKLCH	oklch(42.3% 0.191 265.9)
XYZ	xyz(10.3830, 6.8784, 43.9516)
Luminance	0.0688 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3DB4 #B4931C

analogous

#1C89B4 #1C3DB4 #471CB4

triadic

#1C3DB4 #B41C3D #3DB41C

tetradic

#1C3DB4 #B41C89 #B4931C #1CB447

square

#1C3DB4 #B41C89 #B4931C #1CB447

split-complementary

#1C3DB4 #B4471C #89B41C

monochromatic

#0C194A #142B7F #1C3DB4 #2F55DF #6480E7

Accessibility & contrast

On white

8.84

#1C3DB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#1C3DB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3DB4

8.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3DB4	#FFFFFF	#000000	##FFFFFF
##1C3DB4	1.00	8.84	2.38	8.84
#FFFFFF	8.84	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B8

Deuteranopia (green-blind)

#0043B2

Tritanopia (blue-blind)

#005D73

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1c3db4;
/* rgb */ color: rgb(28, 61, 180);
/* oklch */ color: oklch(42.3% 0.191 265.9);

Tailwind

colors: {
  custom: {
    50: '#7672cc',
    500: '#1c3db4',
    950: '#000000',
  },
}

SCSS

$custom: #1c3db4;
$custom-light: #7672cc;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3db4",
  "rgb": {
    "r": 28,
    "g": 61,
    "b": 180
  },
  "hsl": {
    "h": 226.974,
    "s": 73.077,
    "l": 40.784
  },
  "oklch": {
    "l": 0.42299,
    "c": 0.19134,
    "h": 265.9
  },
  "luminance": 0.0688
}

Semantic roles & 50–950 ramp

primary

#1C3DB4

secondary

#CCB460

accent

#C838F0

background

#F7F6FC

surface

#EEECF9

border

#C9C7D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1C3DB4

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

Preview Lab → · Contrast checker → · Palette generator →