#1C3A99#1C3A99

#1C3A99 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.2% C 0.159 H 265.7°. Best body text is #FFFFFF at 9.93:1 contrast (WCAG AA passes).

Color values

HEX	#1C3A99
RGB	rgb(28, 58, 153)
HSL	hsl(226, 69%, 35%)
HSV	hsv(226, 82%, 60%)
CMYK	cmyk(81.7%, 62.1%, 0%, 40%)
CIE-LAB	lab(28.31, 25.75, -54.90)
CIE-LCH	lch(28.31, 60.63, 295.13°)
OKLab	oklab(39.17% -0.0119 -0.1588)
OKLCH	oklch(39.17% 0.159 265.7)
XYZ	xyz(7.7397, 5.5720, 30.7984)
Luminance	0.0557 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3A99 #997B1C

analogous

#1C7899 #1C3A99 #3C1C99

triadic

#1C3A99 #991C3A #3A991C

tetradic

#1C3A99 #991C78 #997B1C #1C993C

square

#1C3A99 #991C78 #997B1C #1C993C

split-complementary

#1C3A99 #993C1C #78991C

monochromatic

#091332 #132665 #1C3A99 #254ECD #5073DF

Accessibility & contrast

On white

9.93

#1C3A99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#1C3A99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3A99

9.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3A99	#FFFFFF	#000000	##FFFFFF
##1C3A99	1.00	9.93	2.11	9.93
#FFFFFF	9.93	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00499C

Deuteranopia (green-blind)

#003D97

Tritanopia (blue-blind)

#005364

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1c3a99;
/* rgb */ color: rgb(28, 58, 153);
/* oklch */ color: oklch(39.2% 0.159 265.7);

Tailwind

colors: {
  custom: {
    50: '#6f6fb8',
    500: '#1c3a99',
    950: '#000000',
  },
}

SCSS

$custom: #1c3a99;
$custom-light: #6f6fb8;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3a99",
  "rgb": {
    "r": 28,
    "g": 58,
    "b": 153
  },
  "hsl": {
    "h": 225.6,
    "s": 69.061,
    "l": 35.49
  },
  "oklch": {
    "l": 0.39165,
    "c": 0.15923,
    "h": 265.7
  },
  "luminance": 0.05573
}

Semantic roles & 50–950 ramp

primary

#1C3A99

secondary

#C2A64F

accent

#C23CEC

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #1C3A99

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

Preview Lab → · Contrast checker → · Palette generator →