#283C9B#283C9B

#283C9B is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.3% C 0.156 H 269.0°. Best body text is #FFFFFF at 9.50:1 contrast (WCAG AA passes).

Color values

HEX	#283C9B
RGB	rgb(40, 60, 155)
HSL	hsl(230, 59%, 38%)
HSV	hsv(230, 74%, 61%)
CMYK	cmyk(74.2%, 61.3%, 0%, 39.2%)
CIE-LAB	lab(29.53, 26.49, -54.09)
CIE-LCH	lch(29.53, 60.23, 296.10°)
OKLab	oklab(40.28% -0.0026 -0.1562)
OKLCH	oklch(40.28% 0.156 269)
XYZ	xyz(8.4053, 6.0485, 31.7285)
Luminance	0.0605 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283C9B #9B8728

analogous

#28759B #283C9B #4D289B

triadic

#283C9B #9B283C #3C9B28

tetradic

#283C9B #9B2875 #9B8728 #289B4D

square

#283C9B #9B2875 #9B8728 #289B4D

split-complementary

#283C9B #9B4D28 #759B28

monochromatic

#0F163A #1B296A #283C9B #354FCB #667AD7

Accessibility & contrast

On white

9.50

#283C9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#283C9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283C9B

9.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283C9B	#FFFFFF	#000000	##FFFFFF
##283C9B	1.00	9.50	2.21	9.50
#FFFFFF	9.50	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9E

Deuteranopia (green-blind)

#004099

Tritanopia (blue-blind)

#005465

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #283c9b;
/* rgb */ color: rgb(40, 60, 155);
/* oklch */ color: oklch(40.3% 0.156 269.0);

Tailwind

colors: {
  custom: {
    50: '#7371b9',
    500: '#283c9b',
    950: '#000000',
  },
}

SCSS

$custom: #283c9b;
$custom-light: #7371b9;
$custom-dark: #000000;

JSON

{
  "hex": "#283c9b",
  "rgb": {
    "r": 40,
    "g": 60,
    "b": 155
  },
  "hsl": {
    "h": 229.565,
    "s": 58.974,
    "l": 38.235
  },
  "oklch": {
    "l": 0.40277,
    "c": 0.15618,
    "h": 269
  },
  "luminance": 0.06049
}

Semantic roles & 50–950 ramp

primary

#283C9B

secondary

#BDAD61

accent

#C746E2

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #283C9B

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

Preview Lab → · Contrast checker → · Palette generator →