#2839B0#2839B0

#2839B0 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.7% C 0.188 H 269.5°. Best body text is #FFFFFF at 9.12:1 contrast (WCAG AA passes).

Color values

HEX	#2839B0
RGB	rgb(40, 57, 176)
HSL	hsl(233, 63%, 42%)
HSV	hsv(233, 77%, 69%)
CMYK	cmyk(77.3%, 67.6%, 0%, 31%)
CIE-LAB	lab(30.67, 36.24, -64.88)
CIE-LCH	lch(30.67, 74.32, 299.19°)
OKLab	oklab(41.69% -0.0016 -0.1878)
OKLCH	oklch(41.69% 0.188 269.5)
XYZ	xyz(10.1720, 6.5108, 41.7865)
Luminance	0.0651 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.31

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2839B0 #B09F28

analogous

#287DB0 #2839B0 #5B28B0

triadic

#2839B0 #B02839 #39B028

tetradic

#2839B0 #B0287D #B09F28 #28B05B

square

#2839B0 #B0287D #B09F28 #28B05B

split-complementary

#2839B0 #B05B28 #7DB028

monochromatic

#11194C #1D297E #2839B0 #4154D4 #7381DF

Accessibility & contrast

On white

9.12

#2839B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#2839B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2839B0

9.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2839B0	#FFFFFF	#000000	##FFFFFF
##2839B0	1.00	9.12	2.30	9.12
#FFFFFF	9.12	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FB4

Deuteranopia (green-blind)

#0042AE

Tritanopia (blue-blind)

#00596F

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #2839b0;
/* rgb */ color: rgb(40, 57, 176);
/* oklch */ color: oklch(41.7% 0.188 269.5);

Tailwind

colors: {
  custom: {
    50: '#786fc9',
    500: '#2839b0',
    950: '#000000',
  },
}

SCSS

$custom: #2839b0;
$custom-light: #786fc9;
$custom-dark: #000000;

JSON

{
  "hex": "#2839b0",
  "rgb": {
    "r": 40,
    "g": 57,
    "b": 176
  },
  "hsl": {
    "h": 232.5,
    "s": 62.963,
    "l": 42.353
  },
  "oklch": {
    "l": 0.41687,
    "c": 0.1878,
    "h": 269.5
  },
  "luminance": 0.06512
}

Semantic roles & 50–950 ramp

primary

#2839B0

secondary

#C6BB6D

accent

#D142E6

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #2839B0

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

Preview Lab → · Contrast checker → · Palette generator →