#1C288E#1C288E

#1C288E is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.7% C 0.166 H 269.5°. Best body text is #FFFFFF at 12.05:1 contrast (WCAG AA passes).

Color values

HEX	#1C288E
RGB	rgb(28, 40, 142)
HSL	hsl(234, 67%, 33%)
HSV	hsv(234, 80%, 56%)
CMYK	cmyk(80.3%, 71.8%, 0%, 44.3%)
CIE-LAB	lab(22.71, 33.53, -57.30)
CIE-LCH	lch(22.71, 66.39, 300.33°)
OKLab	oklab(34.74% -0.0015 -0.166)
OKLCH	oklch(34.74% 0.166 269.5)
XYZ	xyz(6.1185, 3.7168, 25.9809)
Luminance	0.0372 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C288E #8E821C

analogous

#1C618E #1C288E #491C8E

triadic

#1C288E #8E1C28 #288E1C

tetradic

#1C288E #8E1C61 #8E821C #1C8E49

square

#1C288E #8E1C61 #8E821C #1C8E49

split-complementary

#1C288E #8E491C #618E1C

monochromatic

#080B28 #121A5B #1C288E #2636C1 #4959DB

Accessibility & contrast

On white

12.05

#1C288E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#1C288E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C288E

12.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C288E	#FFFFFF	#000000	##FFFFFF
##1C288E	1.00	12.05	1.74	12.05
#FFFFFF	12.05	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C91

Deuteranopia (green-blind)

#00318C

Tritanopia (blue-blind)

#004558

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1c288e;
/* rgb */ color: rgb(28, 40, 142);
/* oklch */ color: oklch(34.7% 0.166 269.5);

Tailwind

colors: {
  custom: {
    50: '#6d62b0',
    500: '#1c288e',
    950: '#000000',
  },
}

SCSS

$custom: #1c288e;
$custom-light: #6d62b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1c288e",
  "rgb": {
    "r": 28,
    "g": 40,
    "b": 142
  },
  "hsl": {
    "h": 233.684,
    "s": 67.059,
    "l": 33.333
  },
  "oklch": {
    "l": 0.34743,
    "c": 0.16597,
    "h": 269.5
  },
  "luminance": 0.03717
}

Semantic roles & 50–950 ramp

primary

#1C288E

secondary

#BDB149

accent

#D83EEA

background

#F7F5FB

surface

#EDEAF6

border

#C8C6D0

text

#080511

muted

#7B7980

Preview Lab

Preview with #1C288E

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

Preview Lab → · Contrast checker → · Palette generator →