#283FA9#283FA9

#283FA9 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.1% C 0.172 H 268.4°. Best body text is #FFFFFF at 8.85:1 contrast (WCAG AA passes).

Color values

HEX	#283FA9
RGB	rgb(40, 63, 169)
HSL	hsl(229, 62%, 41%)
HSV	hsv(229, 76%, 66%)
CMYK	cmyk(76.3%, 62.7%, 0%, 33.7%)
CIE-LAB	lab(31.51, 29.77, -59.32)
CIE-LCH	lch(31.51, 66.37, 296.65°)
OKLab	oklab(42.11% -0.0049 -0.1715)
OKLCH	oklch(42.11% 0.172 268.4)
XYZ	xyz(9.8115, 6.8696, 38.3373)
Luminance	0.0687 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283FA9 #A99228

analogous

#287FA9 #283FA9 #5128A9

triadic

#283FA9 #A9283F #3FA928

tetradic

#283FA9 #A9287F #A99228 #28A951

square

#283FA9 #A9287F #A99228 #28A951

split-complementary

#283FA9 #A95128 #7FA928

monochromatic

#111A46 #1C2D78 #283FA9 #3D57D1 #6F82DD

Accessibility & contrast

On white

8.85

#283FA9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#283FA9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283FA9

8.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283FA9	#FFFFFF	#000000	##FFFFFF
##283FA9	1.00	8.85	2.37	8.85
#FFFFFF	8.85	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AC

Deuteranopia (green-blind)

#0044A7

Tritanopia (blue-blind)

#005A6E

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #283fa9;
/* rgb */ color: rgb(40, 63, 169);
/* oklch */ color: oklch(42.1% 0.172 268.4);

Tailwind

colors: {
  custom: {
    50: '#7673c3',
    500: '#283fa9',
    950: '#000000',
  },
}

SCSS

$custom: #283fa9;
$custom-light: #7673c3;
$custom-dark: #000000;

JSON

{
  "hex": "#283fa9",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 169
  },
  "hsl": {
    "h": 229.302,
    "s": 61.722,
    "l": 40.98
  },
  "oklch": {
    "l": 0.42111,
    "c": 0.17153,
    "h": 268.4
  },
  "luminance": 0.06871
}

Semantic roles & 50–950 ramp

primary

#283FA9

secondary

#C4B369

accent

#C843E5

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #283FA9

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

Preview Lab → · Contrast checker → · Palette generator →