#1C3FA1#1C3FA1

#1C3FA1 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 40.9% C 0.164 H 264.8°. Best body text is #FFFFFF at 9.23:1 contrast (WCAG AA passes).

Color values

HEX	#1C3FA1
RGB	rgb(28, 63, 161)
HSL	hsl(224, 70%, 37%)
HSV	hsv(224, 83%, 63%)
CMYK	cmyk(82.6%, 60.9%, 0%, 36.9%)
CIE-LAB	lab(30.34, 25.49, -56.44)
CIE-LCH	lch(30.34, 61.93, 294.31°)
OKLab	oklab(40.89% -0.0147 -0.1632)
OKLCH	oklch(40.89% 0.164 264.8)
XYZ	xyz(8.6871, 6.3741, 34.4838)
Luminance	0.0638 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3FA1 #A17E1C

analogous

#1C81A1 #1C3FA1 #3C1CA1

triadic

#1C3FA1 #A11C3F #3FA11C

tetradic

#1C3FA1 #A11C81 #A17E1C #1CA13C

square

#1C3FA1 #A11C81 #A17E1C #1CA13C

split-complementary

#1C3FA1 #A13C1C #81A11C

monochromatic

#0A1639 #132B6D #1C3FA1 #2553D5 #567BE2

Accessibility & contrast

On white

9.23

#1C3FA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#1C3FA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3FA1

9.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3FA1	#FFFFFF	#000000	##FFFFFF
##1C3FA1	1.00	9.23	2.28	9.23
#FFFFFF	9.23	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA4

Deuteranopia (green-blind)

#00419F

Tritanopia (blue-blind)

#00586A

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1c3fa1;
/* rgb */ color: rgb(28, 63, 161);
/* oklch */ color: oklch(40.9% 0.164 264.8);

Tailwind

colors: {
  custom: {
    50: '#7073be',
    500: '#1c3fa1',
    950: '#000000',
  },
}

SCSS

$custom: #1c3fa1;
$custom-light: #7073be;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3fa1",
  "rgb": {
    "r": 28,
    "g": 63,
    "b": 161
  },
  "hsl": {
    "h": 224.211,
    "s": 70.37,
    "l": 37.059
  },
  "oklch": {
    "l": 0.40893,
    "c": 0.16389,
    "h": 264.8
  },
  "luminance": 0.06375
}

Semantic roles & 50–950 ramp

primary

#1C3FA1

secondary

#C5A754

accent

#BE3BED

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1C3FA1

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

Preview Lab → · Contrast checker → · Palette generator →