#283EB1#283EB1

#283EB1 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.7% C 0.183 H 268.6°. Best body text is #FFFFFF at 8.70:1 contrast (WCAG AA passes).

Color values

HEX	#283EB1
RGB	rgb(40, 62, 177)
HSL	hsl(230, 63%, 43%)
HSV	hsv(230, 77%, 69%)
CMYK	cmyk(77.4%, 65%, 0%, 30.6%)
CIE-LAB	lab(31.96, 33.40, -63.35)
CIE-LCH	lch(31.96, 71.61, 297.80°)
OKLab	oklab(42.67% -0.0045 -0.1833)
OKLCH	oklch(42.67% 0.183 268.6)
XYZ	xyz(10.5308, 7.0695, 42.3960)
Luminance	0.0707 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283EB1 #B19B28

analogous

#2882B1 #283EB1 #5628B1

triadic

#283EB1 #B1283E #3EB128

tetradic

#283EB1 #B12882 #B19B28 #28B156

square

#283EB1 #B12882 #B19B28 #28B156

split-complementary

#283EB1 #B15628 #82B128

monochromatic

#111B4D #1D2D7F #283EB1 #4259D4 #7485E0

Accessibility & contrast

On white

8.70

#283EB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#283EB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283EB1

8.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283EB1	#FFFFFF	#000000	##FFFFFF
##283EB1	1.00	8.70	2.41	8.70
#FFFFFF	8.70	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B5

Deuteranopia (green-blind)

#0045AF

Tritanopia (blue-blind)

#005C72

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #283eb1;
/* rgb */ color: rgb(40, 62, 177);
/* oklch */ color: oklch(42.7% 0.183 268.6);

Tailwind

colors: {
  custom: {
    50: '#7873c9',
    500: '#283eb1',
    950: '#000000',
  },
}

SCSS

$custom: #283eb1;
$custom-light: #7873c9;
$custom-dark: #000000;

JSON

{
  "hex": "#283eb1",
  "rgb": {
    "r": 40,
    "g": 62,
    "b": 177
  },
  "hsl": {
    "h": 230.365,
    "s": 63.134,
    "l": 42.549
  },
  "oklch": {
    "l": 0.42665,
    "c": 0.18333,
    "h": 268.6
  },
  "luminance": 0.07071
}

Semantic roles & 50–950 ramp

primary

#283EB1

secondary

#C7B96E

accent

#CC42E6

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #283EB1

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

Preview Lab → · Contrast checker → · Palette generator →