#1C3F8A#1C3F8A

#1C3F8A is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.9% C 0.132 H 262.9°. Best body text is #FFFFFF at 9.87:1 contrast (WCAG AA passes).

Color values

HEX	#1C3F8A
RGB	rgb(28, 63, 138)
HSL	hsl(221, 66%, 33%)
HSV	hsv(221, 80%, 54%)
CMYK	cmyk(79.7%, 54.3%, 0%, 45.9%)
CIE-LAB	lab(28.48, 16.29, -45.41)
CIE-LCH	lch(28.48, 48.24, 289.74°)
OKLab	oklab(38.91% -0.0162 -0.1308)
OKLCH	oklch(38.91% 0.132 262.9)
XYZ	xyz(6.8422, 5.6361, 24.7671)
Luminance	0.0564 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3F8A #8A671C

analogous

#1C768A #1C3F8A #301C8A

triadic

#1C3F8A #8A1C3F #3F8A1C

tetradic

#1C3F8A #8A1C76 #8A671C #1C8A30

square

#1C3F8A #8A1C76 #8A671C #1C8A30

split-complementary

#1C3F8A #8A301C #768A1C

monochromatic

#071124 #122857 #1C3F8A #2656BD #4776DA

Accessibility & contrast

On white

9.87

#1C3F8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#1C3F8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3F8A

9.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3F8A	#FFFFFF	#000000	##FFFFFF
##1C3F8A	1.00	9.87	2.13	9.87
#FFFFFF	9.87	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#07488D

Deuteranopia (green-blind)

#003E89

Tritanopia (blue-blind)

#00515E

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1c3f8a;
/* rgb */ color: rgb(28, 63, 138);
/* oklch */ color: oklch(38.9% 0.132 262.9);

Tailwind

colors: {
  custom: {
    50: '#6a73ad',
    500: '#1c3f8a',
    950: '#000000',
  },
}

SCSS

$custom: #1c3f8a;
$custom-light: #6a73ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3f8a",
  "rgb": {
    "r": 28,
    "g": 63,
    "b": 138
  },
  "hsl": {
    "h": 220.909,
    "s": 66.265,
    "l": 32.549
  },
  "oklch": {
    "l": 0.38908,
    "c": 0.13183,
    "h": 262.9
  },
  "luminance": 0.05637
}

Semantic roles & 50–950 ramp

primary

#1C3F8A

secondary

#BB9646

accent

#B33FE9

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1C3F8A

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

Preview Lab → · Contrast checker → · Palette generator →