#1C3FB4#1C3FB4

#1C3FB4 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.7% C 0.189 H 265.5°. Best body text is #FFFFFF at 8.68:1 contrast (WCAG AA passes).

Color values

HEX	#1C3FB4
RGB	rgb(28, 63, 180)
HSL	hsl(226, 73%, 41%)
HSV	hsv(226, 84%, 71%)
CMYK	cmyk(84.4%, 65%, 0%, 29.4%)
CIE-LAB	lab(32.02, 32.85, -65.05)
CIE-LCH	lch(32.02, 72.87, 296.79°)
OKLab	oklab(42.66% -0.0147 -0.1884)
OKLCH	oklch(42.66% 0.189 265.5)
XYZ	xyz(10.4917, 7.0959, 43.9878)
Luminance	0.0710 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3FB4 #B4911C

analogous

#1C8BB4 #1C3FB4 #451CB4

triadic

#1C3FB4 #B41C3F #3FB41C

tetradic

#1C3FB4 #B41C8B #B4911C #1CB445

square

#1C3FB4 #B41C8B #B4911C #1CB445

split-complementary

#1C3FB4 #B4451C #8BB41C

monochromatic

#0C1A4A #142C7F #1C3FB4 #2F57DF #6482E7

Accessibility & contrast

On white

8.68

#1C3FB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#1C3FB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3FB4

8.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3FB4	#FFFFFF	#000000	##FFFFFF
##1C3FB4	1.00	8.68	2.42	8.68
#FFFFFF	8.68	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B8

Deuteranopia (green-blind)

#0044B2

Tritanopia (blue-blind)

#005E74

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1c3fb4;
/* rgb */ color: rgb(28, 63, 180);
/* oklch */ color: oklch(42.7% 0.189 265.5);

Tailwind

colors: {
  custom: {
    50: '#7673cc',
    500: '#1c3fb4',
    950: '#000000',
  },
}

SCSS

$custom: #1c3fb4;
$custom-light: #7673cc;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3fb4",
  "rgb": {
    "r": 28,
    "g": 63,
    "b": 180
  },
  "hsl": {
    "h": 226.184,
    "s": 73.077,
    "l": 40.784
  },
  "oklch": {
    "l": 0.42663,
    "c": 0.18902,
    "h": 265.5
  },
  "luminance": 0.07097
}

Semantic roles & 50–950 ramp

primary

#1C3FB4

secondary

#CCB360

accent

#C538F0

background

#F7F7FC

surface

#EEEDF9

border

#C9C8D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1C3FB4

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

Preview Lab → · Contrast checker → · Palette generator →