#283A88#283A88

#283A88 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.2% C 0.132 H 269.4°. Best body text is #FFFFFF at 10.24:1 contrast (WCAG AA passes).

Color values

HEX	#283A88
RGB	rgb(40, 58, 136)
HSL	hsl(229, 55%, 35%)
HSV	hsv(229, 71%, 53%)
CMYK	cmyk(70.6%, 57.4%, 0%, 46.7%)
CIE-LAB	lab(27.45, 20.61, -45.81)
CIE-LCH	lch(27.45, 50.23, 294.22°)
OKLab	oklab(38.24% -0.0014 -0.1318)
OKLCH	oklch(38.24% 0.132 269.4)
XYZ	xyz(6.8305, 5.2541, 23.9420)
Luminance	0.0525 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A88 #887628

analogous

#286A88 #283A88 #462888

triadic

#283A88 #88283A #3A8828

tetradic

#283A88 #88286A #887628 #288846

square

#283A88 #88286A #887628 #288846

split-complementary

#283A88 #884628 #6A8828

monochromatic

#0C1229 #1A2659 #283A88 #364EB7 #5B71CF

Accessibility & contrast

On white

10.24

#283A88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#283A88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A88

10.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A88	#FFFFFF	#000000	##FFFFFF
##283A88	1.00	10.24	2.05	10.24
#FFFFFF	10.24	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458B

Deuteranopia (green-blind)

#003D86

Tritanopia (blue-blind)

#004D5B

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283a88;
/* rgb */ color: rgb(40, 58, 136);
/* oklch */ color: oklch(38.2% 0.132 269.4);

Tailwind

colors: {
  custom: {
    50: '#6f6fab',
    500: '#283a88',
    950: '#000000',
  },
}

SCSS

$custom: #283a88;
$custom-light: #6f6fab;
$custom-dark: #000000;

JSON

{
  "hex": "#283a88",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 136
  },
  "hsl": {
    "h": 228.75,
    "s": 54.545,
    "l": 34.51
  },
  "oklch": {
    "l": 0.38235,
    "c": 0.13186,
    "h": 269.4
  },
  "luminance": 0.05255
}

Semantic roles & 50–950 ramp

primary

#283A88

secondary

#B4A358

accent

#C24ADE

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #283A88

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

Preview Lab → · Contrast checker → · Palette generator →