#1831B4#1831B4

#1831B4 is a dark, highly saturated blue. Relative luminance 0.057; OKLCH L 40.1% C 0.205 H 266.6°. Best body text is #FFFFFF at 9.83:1 contrast (WCAG AA passes).

Color values

HEX	#1831B4
RGB	rgb(24, 49, 180)
HSL	hsl(230, 76%, 40%)
HSV	hsv(230, 87%, 71%)
CMYK	cmyk(86.7%, 72.8%, 0%, 29.4%)
CIE-LAB	lab(28.60, 41.49, -70.69)
CIE-LCH	lch(28.60, 81.96, 300.41°)
OKLab	oklab(40.14% -0.0122 -0.205)
OKLCH	oklch(40.14% 0.205 266.6)
XYZ	xyz(9.7103, 5.6849, 43.7567)
Luminance	0.0569 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 7.07

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1831B4 #B49B18

analogous

#187FB4 #1831B4 #4D18B4

triadic

#1831B4 #B41831 #31B418

tetradic

#1831B4 #B4187F #B49B18 #18B44D

square

#1831B4 #B4187F #B49B18 #18B44D

split-complementary

#1831B4 #B44D18 #7FB418

monochromatic

#0A1448 #11227E #1831B4 #2745E2 #5D73E9

Accessibility & contrast

On white

9.83

#1831B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#1831B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1831B4

9.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1831B4	#FFFFFF	#000000	##FFFFFF
##1831B4	1.00	9.83	2.14	9.83
#FFFFFF	9.83	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BB8

Deuteranopia (green-blind)

#003CB2

Tritanopia (blue-blind)

#00576F

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1831b4;
/* rgb */ color: rgb(24, 49, 180);
/* oklch */ color: oklch(40.1% 0.205 266.6);

Tailwind

colors: {
  custom: {
    50: '#766acc',
    500: '#1831b4',
    950: '#000000',
  },
}

SCSS

$custom: #1831b4;
$custom-light: #766acc;
$custom-dark: #000000;

JSON

{
  "hex": "#1831b4",
  "rgb": {
    "r": 24,
    "g": 49,
    "b": 180
  },
  "hsl": {
    "h": 230.385,
    "s": 76.471,
    "l": 40
  },
  "oklch": {
    "l": 0.40137,
    "c": 0.20535,
    "h": 266.6
  },
  "luminance": 0.05686
}

Semantic roles & 50–950 ramp

primary

#1831B4

secondary

#CDBB5B

accent

#D535F3

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0A0614

muted

#7C7A82

Preview Lab

Preview with #1831B4

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

Preview Lab → · Contrast checker → · Palette generator →