#283D80#283D80

#283D80 is a dark, moderate blue. Relative luminance 0.053; OKLCH L 38.2% C 0.116 H 267.6°. Best body text is #FFFFFF at 10.15:1 contrast (WCAG AA passes).

Color values

HEX	#283D80
RGB	rgb(40, 61, 128)
HSL	hsl(226, 52%, 33%)
HSV	hsv(226, 69%, 50%)
CMYK	cmyk(68.8%, 52.3%, 0%, 49.8%)
CIE-LAB	lab(27.70, 15.46, -40.41)
CIE-LCH	lch(27.70, 43.27, 290.94°)
OKLab	oklab(38.24% -0.0049 -0.1159)
OKLCH	oklch(38.24% 0.116 267.6)
XYZ	xyz(6.4388, 5.3465, 21.1105)
Luminance	0.0535 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283D80 #806B28

analogous

#286980 #283D80 #3F2880

triadic

#283D80 #80283D #3D8028

tetradic

#283D80 #802869 #806B28 #28803F

square

#283D80 #802869 #806B28 #28803F

split-complementary

#283D80 #803F28 #698028

monochromatic

#0B1123 #192751 #283D80 #3753AF #5873CB

Accessibility & contrast

On white

10.15

#283D80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#283D80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283D80

10.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283D80	#FFFFFF	#000000	##FFFFFF
##283D80	1.00	10.15	2.07	10.15
#FFFFFF	10.15	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#164682

Deuteranopia (green-blind)

#003E7F

Tritanopia (blue-blind)

#004D58

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #283d80;
/* rgb */ color: rgb(40, 61, 128);
/* oklch */ color: oklch(38.2% 0.116 267.6);

Tailwind

colors: {
  custom: {
    50: '#6d72a5',
    500: '#283d80',
    950: '#000000',
  },
}

SCSS

$custom: #283d80;
$custom-light: #6d72a5;
$custom-dark: #000000;

JSON

{
  "hex": "#283d80",
  "rgb": {
    "r": 40,
    "g": 61,
    "b": 128
  },
  "hsl": {
    "h": 225.682,
    "s": 52.381,
    "l": 32.941
  },
  "oklch": {
    "l": 0.38235,
    "c": 0.11604,
    "h": 267.6
  },
  "luminance": 0.05347
}

Semantic roles & 50–950 ramp

primary

#283D80

secondary

#B09A54

accent

#B94CDC

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#08070F

muted

#7A7A7F

Preview Lab

Preview with #283D80

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

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