#283EA4#283EA4

#283EA4 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.5% C 0.166 H 268.6°. Best body text is #FFFFFF at 9.07:1 contrast (WCAG AA passes).

Color values

HEX	#283EA4
RGB	rgb(40, 62, 164)
HSL	hsl(229, 61%, 40%)
HSV	hsv(229, 76%, 64%)
CMYK	cmyk(75.6%, 62.2%, 0%, 35.7%)
CIE-LAB	lab(30.82, 28.56, -57.44)
CIE-LCH	lch(30.82, 64.14, 296.44°)
OKLab	oklab(41.47% -0.0041 -0.166)
OKLCH	oklch(41.47% 0.166 268.6)
XYZ	xyz(9.2962, 6.5757, 35.8941)
Luminance	0.0658 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283EA4 #A48E28

analogous

#287CA4 #283EA4 #5028A4

triadic

#283EA4 #A4283E #3EA428

tetradic

#283EA4 #A4287C #A48E28 #28A450

square

#283EA4 #A4287C #A48E28 #28A450

split-complementary

#283EA4 #A45028 #7CA428

monochromatic

#101942 #1C2B73 #283EA4 #3A55CF #6B7FDB

Accessibility & contrast

On white

9.07

#283EA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#283EA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283EA4

9.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283EA4	#FFFFFF	#000000	##FFFFFF
##283EA4	1.00	9.07	2.32	9.07
#FFFFFF	9.07	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA7

Deuteranopia (green-blind)

#0043A2

Tritanopia (blue-blind)

#00586B

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #283ea4;
/* rgb */ color: rgb(40, 62, 164);
/* oklch */ color: oklch(41.5% 0.166 268.6);

Tailwind

colors: {
  custom: {
    50: '#7573c0',
    500: '#283ea4',
    950: '#000000',
  },
}

SCSS

$custom: #283ea4;
$custom-light: #7573c0;
$custom-dark: #000000;

JSON

{
  "hex": "#283ea4",
  "rgb": {
    "r": 40,
    "g": 62,
    "b": 164
  },
  "hsl": {
    "h": 229.355,
    "s": 60.784,
    "l": 40
  },
  "oklch": {
    "l": 0.41469,
    "c": 0.16601,
    "h": 268.6
  },
  "luminance": 0.06577
}

Semantic roles & 50–950 ramp

primary

#283EA4

secondary

#C1B166

accent

#C844E4

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #283EA4

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

Preview Lab → · Contrast checker → · Palette generator →