#1C287B#1C287B

#1C287B is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.8% C 0.140 H 270.1°. Best body text is #FFFFFF at 12.81:1 contrast (WCAG AA passes).

Color values

HEX	#1C287B
RGB	rgb(28, 40, 123)
HSL	hsl(232, 63%, 30%)
HSV	hsv(232, 77%, 48%)
CMYK	cmyk(77.2%, 67.5%, 0%, 51.8%)
CIE-LAB	lab(20.80, 26.32, -48.50)
CIE-LCH	lch(20.80, 55.18, 298.49°)
OKLab	oklab(32.78% 0.0002 -0.1402)
OKLCH	oklch(32.78% 0.14 270.1)
XYZ	xyz(4.8116, 3.1940, 19.0980)
Luminance	0.0319 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C287B #7B6F1C

analogous

#1C587B #1C287B #401C7B

triadic

#1C287B #7B1C28 #287B1C

tetradic

#1C287B #7B1C58 #7B6F1C #1C7B40

square

#1C287B #7B1C58 #7B6F1C #1C7B40

split-complementary

#1C287B #7B401C #587B1C

monochromatic

#060819 #111849 #1C287B #2738AD #3E51D3

Accessibility & contrast

On white

12.81

#1C287B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#1C287B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C287B

12.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C287B	#FFFFFF	#000000	##FFFFFF
##1C287B	1.00	12.81	1.64	12.81
#FFFFFF	12.81	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00377E

Deuteranopia (green-blind)

#002E79

Tritanopia (blue-blind)

#003E4D

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1c287b;
/* rgb */ color: rgb(28, 40, 123);
/* oklch */ color: oklch(32.8% 0.140 270.1);

Tailwind

colors: {
  custom: {
    50: '#6862a2',
    500: '#1c287b',
    950: '#000000',
  },
}

SCSS

$custom: #1c287b;
$custom-light: #6862a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1c287b",
  "rgb": {
    "r": 28,
    "g": 40,
    "b": 123
  },
  "hsl": {
    "h": 232.421,
    "s": 62.914,
    "l": 29.608
  },
  "oklch": {
    "l": 0.32778,
    "c": 0.14024,
    "h": 270.1
  },
  "luminance": 0.03195
}

Semantic roles & 50–950 ramp

primary

#1C287B

secondary

#AFA144

accent

#D142E6

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1C287B

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

Preview Lab → · Contrast checker → · Palette generator →