#283B7E#283B7E

#283B7E is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.6% C 0.116 H 268.4°. Best body text is #FFFFFF at 10.41:1 contrast (WCAG AA passes).

Color values

HEX	#283B7E
RGB	rgb(40, 59, 126)
HSL	hsl(227, 52%, 33%)
HSV	hsv(227, 68%, 49%)
CMYK	cmyk(68.3%, 53.2%, 0%, 50.6%)
CIE-LAB	lab(26.98, 16.08, -40.33)
CIE-LCH	lch(26.98, 43.41, 291.73°)
OKLab	oklab(37.64% -0.0032 -0.1157)
OKLCH	oklch(37.64% 0.116 268.4)
XYZ	xyz(6.2036, 5.0848, 20.3892)
Luminance	0.0508 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283B7E #7E6B28

analogous

#28667E #283B7E #40287E

triadic

#283B7E #7E283B #3B7E28

tetradic

#283B7E #7E2866 #7E6B28 #287E40

square

#283B7E #7E2866 #7E6B28 #287E40

split-complementary

#283B7E #7E4028 #667E28

monochromatic

#0B0F21 #192550 #283B7E #3751AC #5770CA

Accessibility & contrast

On white

10.41

#283B7E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#283B7E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B7E

10.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283B7E	#FFFFFF	#000000	##FFFFFF
##283B7E	1.00	10.41	2.02	10.41
#FFFFFF	10.41	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#134480

Deuteranopia (green-blind)

#003C7D

Tritanopia (blue-blind)

#004B56

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #283b7e;
/* rgb */ color: rgb(40, 59, 126);
/* oklch */ color: oklch(37.6% 0.116 268.4);

Tailwind

colors: {
  custom: {
    50: '#6c70a4',
    500: '#283b7e',
    950: '#000000',
  },
}

SCSS

$custom: #283b7e;
$custom-light: #6c70a4;
$custom-dark: #000000;

JSON

{
  "hex": "#283b7e",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 126
  },
  "hsl": {
    "h": 226.744,
    "s": 51.807,
    "l": 32.549
  },
  "oklch": {
    "l": 0.37639,
    "c": 0.11576,
    "h": 268.4
  },
  "luminance": 0.05085
}

Semantic roles & 50–950 ramp

primary

#283B7E

secondary

#AF9A53

accent

#BC4DDB

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#08070F

muted

#7A7A7F

Preview Lab

Preview with #283B7E

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

Preview Lab → · Contrast checker → · Palette generator →