#1C3BB4#1C3BB4

#1C3BB4 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.9% C 0.194 H 266.2°. Best body text is #FFFFFF at 9.00:1 contrast (WCAG AA passes).

Color values

HEX	#1C3BB4
RGB	rgb(28, 59, 180)
HSL	hsl(228, 73%, 41%)
HSV	hsv(228, 84%, 71%)
CMYK	cmyk(84.4%, 67.2%, 0%, 29.4%)
CIE-LAB	lab(31.04, 35.45, -66.67)
CIE-LCH	lch(31.04, 75.50, 298.00°)
OKLab	oklab(41.94% -0.0129 -0.1932)
OKLCH	oklch(41.94% 0.194 266.2)
XYZ	xyz(10.2782, 6.6688, 43.9167)
Luminance	0.0667 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3BB4 #B4951C

analogous

#1C87B4 #1C3BB4 #491CB4

triadic

#1C3BB4 #B41C3B #3BB41C

tetradic

#1C3BB4 #B41C87 #B4951C #1CB449

square

#1C3BB4 #B41C87 #B4951C #1CB449

split-complementary

#1C3BB4 #B4491C #87B41C

monochromatic

#0C184A #142A7F #1C3BB4 #2F53DF #647EE7

Accessibility & contrast

On white

9.00

#1C3BB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#1C3BB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3BB4

9.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3BB4	#FFFFFF	#000000	##FFFFFF
##1C3BB4	1.00	9.00	2.33	9.00
#FFFFFF	9.00	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B8

Deuteranopia (green-blind)

#0042B2

Tritanopia (blue-blind)

#005C72

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1c3bb4;
/* rgb */ color: rgb(28, 59, 180);
/* oklch */ color: oklch(41.9% 0.194 266.2);

Tailwind

colors: {
  custom: {
    50: '#7671cc',
    500: '#1c3bb4',
    950: '#000000',
  },
}

SCSS

$custom: #1c3bb4;
$custom-light: #7671cc;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3bb4",
  "rgb": {
    "r": 28,
    "g": 59,
    "b": 180
  },
  "hsl": {
    "h": 227.763,
    "s": 73.077,
    "l": 40.784
  },
  "oklch": {
    "l": 0.41941,
    "c": 0.19363,
    "h": 266.2
  },
  "luminance": 0.0667
}

Semantic roles & 50–950 ramp

primary

#1C3BB4

secondary

#CCB660

accent

#CA38F0

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #1C3BB4

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

Preview Lab → · Contrast checker → · Palette generator →