#1C3989#1C3989

#1C3989 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.5% C 0.138 H 265.1°. Best body text is #FFFFFF at 10.52:1 contrast (WCAG AA passes).

Color values

HEX	#1C3989
RGB	rgb(28, 57, 137)
HSL	hsl(224, 66%, 32%)
HSV	hsv(224, 80%, 54%)
CMYK	cmyk(79.6%, 58.4%, 0%, 46.3%)
CIE-LAB	lab(26.67, 20.07, -47.71)
CIE-LCH	lch(26.67, 51.76, 292.81°)
OKLab	oklab(37.52% -0.0117 -0.1377)
OKLCH	oklch(37.52% 0.138 265.1)
XYZ	xyz(6.4558, 4.9785, 24.2828)
Luminance	0.0498 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C3989 #896C1C

analogous

#1C6F89 #1C3989 #361C89

triadic

#1C3989 #891C39 #39891C

tetradic

#1C3989 #891C6F #896C1C #1C8936

square

#1C3989 #891C6F #896C1C #1C8936

split-complementary

#1C3989 #89361C #6F891C

monochromatic

#070F23 #122456 #1C3989 #264EBC #466DD9

Accessibility & contrast

On white

10.52

#1C3989 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#1C3989 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3989

10.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C3989	#FFFFFF	#000000	##FFFFFF
##1C3989	1.00	10.52	2.00	10.52
#FFFFFF	10.52	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00448C

Deuteranopia (green-blind)

#003A87

Tritanopia (blue-blind)

#004D5B

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1c3989;
/* rgb */ color: rgb(28, 57, 137);
/* oklch */ color: oklch(37.5% 0.138 265.1);

Tailwind

colors: {
  custom: {
    50: '#6b6eac',
    500: '#1c3989',
    950: '#000000',
  },
}

SCSS

$custom: #1c3989;
$custom-light: #6b6eac;
$custom-dark: #000000;

JSON

{
  "hex": "#1c3989",
  "rgb": {
    "r": 28,
    "g": 57,
    "b": 137
  },
  "hsl": {
    "h": 224.037,
    "s": 66.061,
    "l": 32.353
  },
  "oklch": {
    "l": 0.37522,
    "c": 0.13821,
    "h": 265.1
  },
  "luminance": 0.04979
}

Semantic roles & 50–950 ramp

primary

#1C3989

secondary

#BB9C46

accent

#BC3FE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1C3989

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

Preview Lab → · Contrast checker → · Palette generator →