#1C287D#1C287D

#1C287D is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.0% C 0.143 H 270.0°. Best body text is #FFFFFF at 12.73:1 contrast (WCAG AA passes).

Color values

HEX	#1C287D
RGB	rgb(28, 40, 125)
HSL	hsl(233, 63%, 30%)
HSV	hsv(233, 78%, 49%)
CMYK	cmyk(77.6%, 68%, 0%, 51%)
CIE-LAB	lab(21.00, 27.10, -49.45)
CIE-LCH	lch(21.00, 56.39, 298.72°)
OKLab	oklab(32.98% 0.0001 -0.143)
OKLCH	oklch(32.98% 0.143 270)
XYZ	xyz(4.9381, 3.2446, 19.7641)
Luminance	0.0324 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C287D #7D711C

analogous

#1C597D #1C287D #401C7D

triadic

#1C287D #7D1C28 #287D1C

tetradic

#1C287D #7D1C59 #7D711C #1C7D40

square

#1C287D #7D1C59 #7D711C #1C7D40

split-complementary

#1C287D #7D401C #597D1C

monochromatic

#060819 #11184B #1C287D #2738AF #3F52D4

Accessibility & contrast

On white

12.73

#1C287D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#1C287D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C287D

12.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C287D	#FFFFFF	#000000	##FFFFFF
##1C287D	1.00	12.73	1.65	12.73
#FFFFFF	12.73	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003780

Deuteranopia (green-blind)

#002E7B

Tritanopia (blue-blind)

#003F4E

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1c287d;
/* rgb */ color: rgb(28, 40, 125);
/* oklch */ color: oklch(33.0% 0.143 270.0);

Tailwind

colors: {
  custom: {
    50: '#6962a4',
    500: '#1c287d',
    950: '#000000',
  },
}

SCSS

$custom: #1c287d;
$custom-light: #6962a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1c287d",
  "rgb": {
    "r": 28,
    "g": 40,
    "b": 125
  },
  "hsl": {
    "h": 232.577,
    "s": 63.399,
    "l": 30
  },
  "oklch": {
    "l": 0.32979,
    "c": 0.14303,
    "h": 270
  },
  "luminance": 0.03245
}

Semantic roles & 50–950 ramp

primary

#1C287D

secondary

#B1A344

accent

#D241E6

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1C287D

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

Preview Lab → · Contrast checker → · Palette generator →