#1833A1#1833A1

#1833A1 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.5% C 0.179 H 266.3°. Best body text is #FFFFFF at 10.36:1 contrast (WCAG AA passes).

Color values

HEX	#1833A1
RGB	rgb(24, 51, 161)
HSL	hsl(228, 74%, 36%)
HSV	hsv(228, 85%, 63%)
CMYK	cmyk(85.1%, 68.3%, 0%, 36.9%)
CIE-LAB	lab(27.11, 33.21, -61.73)
CIE-LCH	lch(27.11, 70.09, 298.28°)
OKLab	oklab(38.47% -0.0115 -0.1789)
OKLCH	oklch(38.47% 0.179 266.3)
XYZ	xyz(7.9913, 5.1341, 34.2811)
Luminance	0.0513 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1833A1 #A18618

analogous

#1878A1 #1833A1 #4218A1

triadic

#1833A1 #A11833 #33A118

tetradic

#1833A1 #A11878 #A18618 #18A142

square

#1833A1 #A11878 #A18618 #18A142

split-complementary

#1833A1 #A14218 #78A118

monochromatic

#081136 #10226C #1833A1 #2044D6 #4F6CE5

Accessibility & contrast

On white

10.36

#1833A1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#1833A1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1833A1

10.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1833A1	#FFFFFF	#000000	##FFFFFF
##1833A1	1.00	10.36	2.03	10.36
#FFFFFF	10.36	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0047A4

Deuteranopia (green-blind)

#003A9F

Tritanopia (blue-blind)

#005165

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1833a1;
/* rgb */ color: rgb(24, 51, 161);
/* oklch */ color: oklch(38.5% 0.179 266.3);

Tailwind

colors: {
  custom: {
    50: '#716abe',
    500: '#1833a1',
    950: '#000000',
  },
}

SCSS

$custom: #1833a1;
$custom-light: #716abe;
$custom-dark: #000000;

JSON

{
  "hex": "#1833a1",
  "rgb": {
    "r": 24,
    "g": 51,
    "b": 161
  },
  "hsl": {
    "h": 228.175,
    "s": 74.054,
    "l": 36.275
  },
  "oklch": {
    "l": 0.38474,
    "c": 0.17926,
    "h": 266.3
  },
  "luminance": 0.05135
}

Semantic roles & 50–950 ramp

primary

#1833A1

secondary

#C7AF4E

accent

#CC37F1

background

#F7F6FB

surface

#EDEBF7

border

#C8C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1833A1

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

Preview Lab → · Contrast checker → · Palette generator →