#1C33B4#1C33B4

#1C33B4 is a dark, highly saturated blue. Relative luminance 0.059; OKLCH L 40.6% C 0.202 H 267.2°. Best body text is #FFFFFF at 9.62:1 contrast (WCAG AA passes).

Color values

HEX	#1C33B4
RGB	rgb(28, 51, 180)
HSL	hsl(231, 73%, 41%)
HSV	hsv(231, 84%, 71%)
CMYK	cmyk(84.4%, 71.7%, 0%, 29.4%)
CIE-LAB	lab(29.18, 40.49, -69.73)
CIE-LCH	lch(29.18, 80.64, 300.14°)
OKLab	oklab(40.59% -0.0099 -0.2021)
OKLCH	oklch(40.59% 0.202 267.2)
XYZ	xyz(9.8981, 5.9086, 43.7900)
Luminance	0.0591 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.79

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C33B4 #B49D1C

analogous

#1C7FB4 #1C33B4 #511CB4

triadic

#1C33B4 #B41C33 #33B41C

tetradic

#1C33B4 #B41C7F #B49D1C #1CB451

square

#1C33B4 #B41C7F #B49D1C #1CB451

split-complementary

#1C33B4 #B4511C #7FB41C

monochromatic

#0C154A #14247F #1C33B4 #2F49DF #6477E7

Accessibility & contrast

On white

9.62

#1C33B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#1C33B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C33B4

9.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C33B4	#FFFFFF	#000000	##FFFFFF
##1C33B4	1.00	9.62	2.18	9.62
#FFFFFF	9.62	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CB8

Deuteranopia (green-blind)

#003DB2

Tritanopia (blue-blind)

#005870

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1c33b4;
/* rgb */ color: rgb(28, 51, 180);
/* oklch */ color: oklch(40.6% 0.202 267.2);

Tailwind

colors: {
  custom: {
    50: '#776bcc',
    500: '#1c33b4',
    950: '#000000',
  },
}

SCSS

$custom: #1c33b4;
$custom-light: #776bcc;
$custom-dark: #000000;

JSON

{
  "hex": "#1c33b4",
  "rgb": {
    "r": 28,
    "g": 51,
    "b": 180
  },
  "hsl": {
    "h": 230.921,
    "s": 73.077,
    "l": 40.784
  },
  "oklch": {
    "l": 0.40591,
    "c": 0.20238,
    "h": 267.2
  },
  "luminance": 0.0591
}

Semantic roles & 50–950 ramp

primary

#1C33B4

secondary

#CCBB60

accent

#D438F0

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0714

muted

#7C7A82

Preview Lab

Preview with #1C33B4

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

Preview Lab → · Contrast checker → · Palette generator →