#283EA3#283EA3

#283EA3 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.4% C 0.165 H 268.6°. Best body text is #FFFFFF at 9.10:1 contrast (WCAG AA passes).

Color values

HEX	#283EA3
RGB	rgb(40, 62, 163)
HSL	hsl(229, 61%, 40%)
HSV	hsv(229, 75%, 64%)
CMYK	cmyk(75.5%, 62%, 0%, 36.1%)
CIE-LAB	lab(30.74, 28.18, -56.97)
CIE-LCH	lch(30.74, 63.56, 296.32°)
OKLab	oklab(41.38% -0.0041 -0.1646)
OKLCH	oklch(41.38% 0.165 268.6)
XYZ	xyz(9.2063, 6.5397, 35.4203)
Luminance	0.0654 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283EA3 #A38D28

analogous

#287CA3 #283EA3 #4F28A3

triadic

#283EA3 #A3283E #3EA328

tetradic

#283EA3 #A3287C #A38D28 #28A34F

square

#283EA3 #A3287C #A38D28 #28A34F

split-complementary

#283EA3 #A34F28 #7CA328

monochromatic

#101941 #1C2B72 #283EA3 #3A54CF #6B7FDB

Accessibility & contrast

On white

9.10

#283EA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#283EA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283EA3

9.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283EA3	#FFFFFF	#000000	##FFFFFF
##283EA3	1.00	9.10	2.31	9.10
#FFFFFF	9.10	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA6

Deuteranopia (green-blind)

#0043A1

Tritanopia (blue-blind)

#00586A

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #283ea3;
/* rgb */ color: rgb(40, 62, 163);
/* oklch */ color: oklch(41.4% 0.165 268.6);

Tailwind

colors: {
  custom: {
    50: '#7573bf',
    500: '#283ea3',
    950: '#000000',
  },
}

SCSS

$custom: #283ea3;
$custom-light: #7573bf;
$custom-dark: #000000;

JSON

{
  "hex": "#283ea3",
  "rgb": {
    "r": 40,
    "g": 62,
    "b": 163
  },
  "hsl": {
    "h": 229.268,
    "s": 60.591,
    "l": 39.804
  },
  "oklch": {
    "l": 0.41379,
    "c": 0.16465,
    "h": 268.6
  },
  "luminance": 0.06541
}

Semantic roles & 50–950 ramp

primary

#283EA3

secondary

#C1B166

accent

#C744E4

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #283EA3

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

Preview Lab → · Contrast checker → · Palette generator →