#283EB0#283EB0

#283EB0 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.6% C 0.182 H 268.6°. Best body text is #FFFFFF at 8.73:1 contrast (WCAG AA passes).

Color values

HEX	#283EB0
RGB	rgb(40, 62, 176)
HSL	hsl(230, 63%, 42%)
HSV	hsv(230, 77%, 69%)
CMYK	cmyk(77.3%, 64.8%, 0%, 31%)
CIE-LAB	lab(31.87, 33.03, -62.90)
CIE-LCH	lch(31.87, 71.05, 297.71°)
OKLab	oklab(42.57% -0.0045 -0.182)
OKLCH	oklch(42.57% 0.182 268.6)
XYZ	xyz(10.4315, 7.0298, 41.8730)
Luminance	0.0703 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283EB0 #B09A28

analogous

#2882B0 #283EB0 #5628B0

triadic

#283EB0 #B0283E #3EB028

tetradic

#283EB0 #B02882 #B09A28 #28B056

square

#283EB0 #B02882 #B09A28 #28B056

split-complementary

#283EB0 #B05628 #82B028

monochromatic

#111B4C #1D2C7E #283EB0 #4159D4 #7385DF

Accessibility & contrast

On white

8.73

#283EB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#283EB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283EB0

8.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283EB0	#FFFFFF	#000000	##FFFFFF
##283EB0	1.00	8.73	2.41	8.73
#FFFFFF	8.73	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B4

Deuteranopia (green-blind)

#0045AE

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #283eb0;
/* rgb */ color: rgb(40, 62, 176);
/* oklch */ color: oklch(42.6% 0.182 268.6);

Tailwind

colors: {
  custom: {
    50: '#7873c9',
    500: '#283eb0',
    950: '#000000',
  },
}

SCSS

$custom: #283eb0;
$custom-light: #7873c9;
$custom-dark: #000000;

JSON

{
  "hex": "#283eb0",
  "rgb": {
    "r": 40,
    "g": 62,
    "b": 176
  },
  "hsl": {
    "h": 230.294,
    "s": 62.963,
    "l": 42.353
  },
  "oklch": {
    "l": 0.42571,
    "c": 0.18202,
    "h": 268.6
  },
  "luminance": 0.07031
}

Semantic roles & 50–950 ramp

primary

#283EB0

secondary

#C6B86D

accent

#CB42E6

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #283EB0

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

Preview Lab → · Contrast checker → · Palette generator →