#1C338B#1C338B

#1C338B is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.5% C 0.149 H 267.1°. Best body text is #FFFFFF at 11.08:1 contrast (WCAG AA passes).

Color values

HEX	#1C338B
RGB	rgb(28, 51, 139)
HSL	hsl(228, 66%, 33%)
HSV	hsv(228, 80%, 55%)
CMYK	cmyk(79.9%, 63.3%, 0%, 45.5%)
CIE-LAB	lab(25.19, 25.03, -51.37)
CIE-LCH	lch(25.19, 57.14, 295.97°)
OKLab	oklab(36.47% -0.0075 -0.1485)
OKLCH	oklch(36.47% 0.149 267.1)
XYZ	xyz(6.3213, 4.4779, 24.9523)
Luminance	0.0448 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C338B #8B741C

analogous

#1C6A8B #1C338B #3D1C8B

triadic

#1C338B #8B1C33 #338B1C

tetradic

#1C338B #8B1C6A #8B741C #1C8B3D

square

#1C338B #8B1C6A #8B741C #1C8B3D

split-complementary

#1C338B #8B3D1C #6A8B1C

monochromatic

#070E25 #122058 #1C338B #2646BE #4766DA

Accessibility & contrast

On white

11.08

#1C338B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#1C338B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C338B

11.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C338B	#FFFFFF	#000000	##FFFFFF
##1C338B	1.00	11.08	1.90	11.08
#FFFFFF	11.08	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00418E

Deuteranopia (green-blind)

#003789

Tritanopia (blue-blind)

#004A5A

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1c338b;
/* rgb */ color: rgb(28, 51, 139);
/* oklch */ color: oklch(36.5% 0.149 267.1);

Tailwind

colors: {
  custom: {
    50: '#6c6aae',
    500: '#1c338b',
    950: '#000000',
  },
}

SCSS

$custom: #1c338b;
$custom-light: #6c6aae;
$custom-dark: #000000;

JSON

{
  "hex": "#1c338b",
  "rgb": {
    "r": 28,
    "g": 51,
    "b": 139
  },
  "hsl": {
    "h": 227.568,
    "s": 66.467,
    "l": 32.745
  },
  "oklch": {
    "l": 0.36469,
    "c": 0.14873,
    "h": 267.1
  },
  "luminance": 0.04479
}

Semantic roles & 50–950 ramp

primary

#1C338B

secondary

#BCA447

accent

#C63EE9

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1C338B

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

Preview Lab → · Contrast checker → · Palette generator →