#1C228B#1C228B

#1C228B is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.4% C 0.169 H 270.5°. Best body text is #FFFFFF at 12.72:1 contrast (WCAG AA passes).

Color values

HEX	#1C228B
RGB	rgb(28, 34, 139)
HSL	hsl(237, 66%, 33%)
HSV	hsv(237, 80%, 55%)
CMYK	cmyk(79.9%, 75.5%, 0%, 45.5%)
CIE-LAB	lab(21.04, 36.19, -58.20)
CIE-LCH	lch(21.04, 68.53, 301.87°)
OKLab	oklab(33.44% 0.0016 -0.1685)
OKLCH	oklch(33.44% 0.169 270.5)
XYZ	xyz(5.7095, 3.2544, 24.7483)
Luminance	0.0326 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C228B #8B851C

analogous

#1C598B #1C228B #4E1C8B

triadic

#1C228B #8B1C22 #228B1C

tetradic

#1C228B #8B1C59 #8B851C #1C8B4E

square

#1C228B #8B1C59 #8B851C #1C8B4E

split-complementary

#1C228B #8B4E1C #598B1C

monochromatic

#070925 #121658 #1C228B #262EBE #474FDA

Accessibility & contrast

On white

12.72

#1C228B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#1C228B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C228B

12.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C228B	#FFFFFF	#000000	##FFFFFF
##1C228B	1.00	12.72	1.65	12.72
#FFFFFF	12.72	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00388E

Deuteranopia (green-blind)

#002D89

Tritanopia (blue-blind)

#004154

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1c228b;
/* rgb */ color: rgb(28, 34, 139);
/* oklch */ color: oklch(33.4% 0.169 270.5);

Tailwind

colors: {
  custom: {
    50: '#6d5eae',
    500: '#1c228b',
    950: '#000000',
  },
}

SCSS

$custom: #1c228b;
$custom-light: #6d5eae;
$custom-dark: #000000;

JSON

{
  "hex": "#1c228b",
  "rgb": {
    "r": 28,
    "g": 34,
    "b": 139
  },
  "hsl": {
    "h": 236.757,
    "s": 66.467,
    "l": 32.745
  },
  "oklch": {
    "l": 0.33444,
    "c": 0.16856,
    "h": 270.5
  },
  "luminance": 0.03255
}

Semantic roles & 50–950 ramp

primary

#1C228B

secondary

#BCB647

accent

#E03EE9

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1C228B

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

Preview Lab → · Contrast checker → · Palette generator →