#1C33A9#1C33A9

#1C33A9 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 39.4% C 0.189 H 267.3°. Best body text is #FFFFFF at 10.02:1 contrast (WCAG AA passes).

Color values

HEX	#1C33A9
RGB	rgb(28, 51, 169)
HSL	hsl(230, 72%, 39%)
HSV	hsv(230, 83%, 66%)
CMYK	cmyk(83.4%, 69.8%, 0%, 33.7%)
CIE-LAB	lab(28.06, 36.49, -65.00)
CIE-LCH	lch(28.06, 74.54, 299.31°)
OKLab	oklab(39.44% -0.0089 -0.1884)
OKLCH	oklch(39.44% 0.189 267.3)
XYZ	xyz(8.8217, 5.4780, 38.1208)
Luminance	0.0548 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C33A9 #A9921C

analogous

#1C79A9 #1C33A9 #4B1CA9

triadic

#1C33A9 #A91C33 #33A91C

tetradic

#1C33A9 #A91C79 #A9921C #1CA94B

square

#1C33A9 #A91C79 #A9921C #1CA94B

split-complementary

#1C33A9 #A94B1C #79A91C

monochromatic

#0B1340 #132374 #1C33A9 #2744DB #5B72E4

Accessibility & contrast

On white

10.02

#1C33A9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#1C33A9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C33A9

10.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C33A9	#FFFFFF	#000000	##FFFFFF
##1C33A9	1.00	10.02	2.10	10.02
#FFFFFF	10.02	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	10.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049AD

Deuteranopia (green-blind)

#003BA7

Tritanopia (blue-blind)

#00546A

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1c33a9;
/* rgb */ color: rgb(28, 51, 169);
/* oklch */ color: oklch(39.4% 0.189 267.3);

Tailwind

colors: {
  custom: {
    50: '#746bc4',
    500: '#1c33a9',
    950: '#000000',
  },
}

SCSS

$custom: #1c33a9;
$custom-light: #746bc4;
$custom-dark: #000000;

JSON

{
  "hex": "#1c33a9",
  "rgb": {
    "r": 28,
    "g": 51,
    "b": 169
  },
  "hsl": {
    "h": 230.213,
    "s": 71.574,
    "l": 38.627
  },
  "oklch": {
    "l": 0.3944,
    "c": 0.18859,
    "h": 267.3
  },
  "luminance": 0.05479
}

Semantic roles & 50–950 ramp

primary

#1C33A9

secondary

#C8B659

accent

#D139EE

background

#F7F6FC

surface

#EEEBF8

border

#C9C6D1

text

#0A0613

muted

#7C7A82

Preview Lab

Preview with #1C33A9

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

Preview Lab → · Contrast checker → · Palette generator →