#1C4DA1#1C4DA1

#1C4DA1 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 43.8% C 0.146 H 260.5°. Best body text is #FFFFFF at 8.00:1 contrast (WCAG AA passes).

Color values

HEX	#1C4DA1
RGB	rgb(28, 77, 161)
HSL	hsl(218, 70%, 37%)
HSV	hsv(218, 83%, 63%)
CMYK	cmyk(82.6%, 52.2%, 0%, 36.9%)
CIE-LAB	lab(34.25, 15.98, -50.08)
CIE-LCH	lch(34.25, 52.57, 287.70°)
OKLab	oklab(43.85% -0.0241 -0.1443)
OKLCH	oklch(43.85% 0.146 260.5)
XYZ	xyz(9.5634, 8.1267, 34.7759)
Luminance	0.0813 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C4DA1 #A1701C

analogous

#1C8FA1 #1C4DA1 #2E1CA1

triadic

#1C4DA1 #A11C4D #4DA11C

tetradic

#1C4DA1 #A11C8F #A1701C #1CA12E

square

#1C4DA1 #A11C8F #A1701C #1CA12E

split-complementary

#1C4DA1 #A12E1C #8FA11C

monochromatic

#0A1B39 #13346D #1C4DA1 #2566D5 #5689E2

Accessibility & contrast

On white

8.00

#1C4DA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#1C4DA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C4DA1

8.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C4DA1	#FFFFFF	#000000	##FFFFFF
##1C4DA1	1.00	8.00	2.63	8.00
#FFFFFF	8.00	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	8.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1457A4

Deuteranopia (green-blind)

#004B9F

Tritanopia (blue-blind)

#00616F

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1c4da1;
/* rgb */ color: rgb(28, 77, 161);
/* oklch */ color: oklch(43.8% 0.146 260.5);

Tailwind

colors: {
  custom: {
    50: '#707ebd',
    500: '#1c4da1',
    950: '#000000',
  },
}

SCSS

$custom: #1c4da1;
$custom-light: #707ebd;
$custom-dark: #000000;

JSON

{
  "hex": "#1c4da1",
  "rgb": {
    "r": 28,
    "g": 77,
    "b": 161
  },
  "hsl": {
    "h": 217.895,
    "s": 70.37,
    "l": 37.059
  },
  "oklch": {
    "l": 0.43845,
    "c": 0.1463,
    "h": 260.5
  },
  "luminance": 0.08128
}

Semantic roles & 50–950 ramp

primary

#1C4DA1

secondary

#C59B54

accent

#AB3BED

background

#F7F7FB

surface

#EDEEF7

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1C4DA1

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

Preview Lab → · Contrast checker → · Palette generator →