#1C287E#1C287E

#1C287E is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.1% C 0.144 H 270.0°. Best body text is #FFFFFF at 12.69:1 contrast (WCAG AA passes).

Color values

HEX	#1C287E
RGB	rgb(28, 40, 126)
HSL	hsl(233, 64%, 30%)
HSV	hsv(233, 78%, 49%)
CMYK	cmyk(77.8%, 68.3%, 0%, 50.6%)
CIE-LAB	lab(21.10, 27.48, -49.93)
CIE-LCH	lch(21.10, 56.99, 298.83°)
OKLab	oklab(33.08% 0 -0.1444)
OKLCH	oklch(33.08% 0.144 270)
XYZ	xyz(5.0023, 3.2703, 20.1022)
Luminance	0.0327 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C287E #7E721C

analogous

#1C597E #1C287E #411C7E

triadic

#1C287E #7E1C28 #287E1C

tetradic

#1C287E #7E1C59 #7E721C #1C7E41

square

#1C287E #7E1C59 #7E721C #1C7E41

split-complementary

#1C287E #7E411C #597E1C

monochromatic

#06081A #11184C #1C287E #2738B0 #4052D5

Accessibility & contrast

On white

12.69

#1C287E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#1C287E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C287E

12.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C287E	#FFFFFF	#000000	##FFFFFF
##1C287E	1.00	12.69	1.65	12.69
#FFFFFF	12.69	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003781

Deuteranopia (green-blind)

#002E7C

Tritanopia (blue-blind)

#003F4F

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1c287e;
/* rgb */ color: rgb(28, 40, 126);
/* oklch */ color: oklch(33.1% 0.144 270.0);

Tailwind

colors: {
  custom: {
    50: '#6962a4',
    500: '#1c287e',
    950: '#000000',
  },
}

SCSS

$custom: #1c287e;
$custom-light: #6962a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1c287e",
  "rgb": {
    "r": 28,
    "g": 40,
    "b": 126
  },
  "hsl": {
    "h": 232.653,
    "s": 63.636,
    "l": 30.196
  },
  "oklch": {
    "l": 0.3308,
    "c": 0.14442,
    "h": 270
  },
  "luminance": 0.03271
}

Semantic roles & 50–950 ramp

primary

#1C287E

secondary

#B2A444

accent

#D241E7

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1C287E

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

Preview Lab → · Contrast checker → · Palette generator →