#1C3899#1C3899

#1C3899 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.8% C 0.162 H 266.2°. Best body text is #FFFFFF at 10.12:1 contrast (WCAG AA passes).

Color values

HEX	#1C3899
RGB	rgb(28, 56, 153)
HSL	hsl(227, 69%, 35%)
HSV	hsv(227, 82%, 60%)
CMYK	cmyk(81.7%, 63.4%, 0%, 40%)
CIE-LAB	lab(27.78, 27.11, -55.76)
CIE-LCH	lch(27.78, 62.00, 295.92°)
OKLab	oklab(38.77% -0.0107 -0.1614)
OKLCH	oklch(38.77% 0.162 266.2)
XYZ	xyz(7.6408, 5.3742, 30.7654)
Luminance	0.0537 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3899 #997D1C

analogous

#1C7699 #1C3899 #3E1C99

triadic

#1C3899 #991C38 #38991C

tetradic

#1C3899 #991C76 #997D1C #1C993E

square

#1C3899 #991C76 #997D1C #1C993E

split-complementary

#1C3899 #993E1C #76991C

monochromatic

#091232 #132565 #1C3899 #254BCD #5070DF

Accessibility & contrast

On white

10.12

#1C3899 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#1C3899 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3899

10.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3899	#FFFFFF	#000000	##FFFFFF
##1C3899	1.00	10.12	2.08	10.12
#FFFFFF	10.12	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00489C

Deuteranopia (green-blind)

#003C97

Tritanopia (blue-blind)

#005163

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1c3899;
/* rgb */ color: rgb(28, 56, 153);
/* oklch */ color: oklch(38.8% 0.162 266.2);

Tailwind

colors: {
  custom: {
    50: '#6f6eb8',
    500: '#1c3899',
    950: '#000000',
  },
}

SCSS

$custom: #1c3899;
$custom-light: #6f6eb8;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3899",
  "rgb": {
    "r": 28,
    "g": 56,
    "b": 153
  },
  "hsl": {
    "h": 226.56,
    "s": 69.061,
    "l": 35.49
  },
  "oklch": {
    "l": 0.38771,
    "c": 0.16171,
    "h": 266.2
  },
  "luminance": 0.05375
}

Semantic roles & 50–950 ramp

primary

#1C3899

secondary

#C2A84F

accent

#C43CEC

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #1C3899

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

Preview Lab → · Contrast checker → · Palette generator →