#283A80#283A80

#283A80 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.6% C 0.120 H 269.1°. Best body text is #FFFFFF at 10.46:1 contrast (WCAG AA passes).

Color values

HEX	#283A80
RGB	rgb(40, 58, 128)
HSL	hsl(228, 52%, 33%)
HSV	hsv(228, 69%, 50%)
CMYK	cmyk(68.8%, 54.7%, 0%, 49.8%)
CIE-LAB	lab(26.83, 17.54, -41.81)
CIE-LCH	lch(26.83, 45.34, 292.76°)
OKLab	oklab(37.58% -0.002 -0.1201)
OKLCH	oklch(37.58% 0.12 269.1)
XYZ	xyz(6.2831, 5.0352, 21.0587)
Luminance	0.0504 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A80 #806E28

analogous

#286680 #283A80 #422880

triadic

#283A80 #80283A #3A8028

tetradic

#283A80 #802866 #806E28 #288042

square

#283A80 #802866 #806E28 #288042

split-complementary

#283A80 #804228 #668028

monochromatic

#0B1023 #192551 #283A80 #374FAF #586FCB

Accessibility & contrast

On white

10.46

#283A80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#283A80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A80

10.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A80	#FFFFFF	#000000	##FFFFFF
##283A80	1.00	10.46	2.01	10.46
#FFFFFF	10.46	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C4482

Deuteranopia (green-blind)

#003C7F

Tritanopia (blue-blind)

#004B57

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #283a80;
/* rgb */ color: rgb(40, 58, 128);
/* oklch */ color: oklch(37.6% 0.120 269.1);

Tailwind

colors: {
  custom: {
    50: '#6d6fa5',
    500: '#283a80',
    950: '#000000',
  },
}

SCSS

$custom: #283a80;
$custom-light: #6d6fa5;
$custom-dark: #000000;

JSON

{
  "hex": "#283a80",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 128
  },
  "hsl": {
    "h": 227.727,
    "s": 52.381,
    "l": 32.941
  },
  "oklch": {
    "l": 0.3758,
    "c": 0.12011,
    "h": 269.1
  },
  "luminance": 0.05036
}

Semantic roles & 50–950 ramp

primary

#283A80

secondary

#B09D54

accent

#BE4CDC

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#08070F

muted

#7A7A7F

Preview Lab

Preview with #283A80

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

Preview Lab → · Contrast checker → · Palette generator →