#283EA5#283EA5

#283EA5 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.6% C 0.167 H 268.6°. Best body text is #FFFFFF at 9.04:1 contrast (WCAG AA passes).

Color values

HEX	#283EA5
RGB	rgb(40, 62, 165)
HSL	hsl(229, 61%, 40%)
HSV	hsv(229, 76%, 65%)
CMYK	cmyk(75.8%, 62.4%, 0%, 35.3%)
CIE-LAB	lab(30.91, 28.93, -57.90)
CIE-LCH	lch(30.91, 64.72, 296.55°)
OKLab	oklab(41.56% -0.0041 -0.1673)
OKLCH	oklch(41.56% 0.167 268.6)
XYZ	xyz(9.3869, 6.6120, 36.3715)
Luminance	0.0661 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283EA5 #A58F28

analogous

#287CA5 #283EA5 #5028A5

triadic

#283EA5 #A5283E #3EA528

tetradic

#283EA5 #A5287C #A58F28 #28A550

square

#283EA5 #A5287C #A58F28 #28A550

split-complementary

#283EA5 #A55028 #7CA528

monochromatic

#101942 #1C2B74 #283EA5 #3B55CF #6C80DB

Accessibility & contrast

On white

9.04

#283EA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#283EA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283EA5

9.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283EA5	#FFFFFF	#000000	##FFFFFF
##283EA5	1.00	9.04	2.32	9.04
#FFFFFF	9.04	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA8

Deuteranopia (green-blind)

#0043A3

Tritanopia (blue-blind)

#00586B

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #283ea5;
/* rgb */ color: rgb(40, 62, 165);
/* oklch */ color: oklch(41.6% 0.167 268.6);

Tailwind

colors: {
  custom: {
    50: '#7573c1',
    500: '#283ea5',
    950: '#000000',
  },
}

SCSS

$custom: #283ea5;
$custom-light: #7573c1;
$custom-dark: #000000;

JSON

{
  "hex": "#283ea5",
  "rgb": {
    "r": 40,
    "g": 62,
    "b": 165
  },
  "hsl": {
    "h": 229.44,
    "s": 60.976,
    "l": 40.196
  },
  "oklch": {
    "l": 0.41559,
    "c": 0.16736,
    "h": 268.6
  },
  "luminance": 0.06613
}

Semantic roles & 50–950 ramp

primary

#283EA5

secondary

#C2B267

accent

#C844E4

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #283EA5

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

Preview Lab → · Contrast checker → · Palette generator →