#283F8C#283F8C

#283F8C is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.6% C 0.131 H 267.5°. Best body text is #FFFFFF at 9.63:1 contrast (WCAG AA passes).

Color values

HEX	#283F8C
RGB	rgb(40, 63, 140)
HSL	hsl(226, 56%, 35%)
HSV	hsv(226, 71%, 55%)
CMYK	cmyk(71.4%, 55%, 0%, 45.1%)
CIE-LAB	lab(29.16, 18.72, -45.51)
CIE-LCH	lch(29.16, 49.21, 292.35°)
OKLab	oklab(39.62% -0.0057 -0.1309)
OKLCH	oklch(39.62% 0.131 267.5)
XYZ	xyz(7.3846, 5.8988, 25.5553)
Luminance	0.0590 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F8C #8C7528

analogous

#28718C #283F8C #43288C

triadic

#283F8C #8C283F #3F8C28

tetradic

#283F8C #8C2871 #8C7528 #288C43

square

#283F8C #8C2871 #8C7528 #288C43

split-complementary

#283F8C #8C4328 #718C28

monochromatic

#0D142D #1A2A5C #283F8C #3654BC #5E78D1

Accessibility & contrast

On white

9.63

#283F8C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#283F8C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F8C

9.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F8C	#FFFFFF	#000000	##FFFFFF
##283F8C	1.00	9.63	2.18	9.63
#FFFFFF	9.63	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#06498F

Deuteranopia (green-blind)

#00408A

Tritanopia (blue-blind)

#00515F

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #283f8c;
/* rgb */ color: rgb(40, 63, 140);
/* oklch */ color: oklch(39.6% 0.131 267.5);

Tailwind

colors: {
  custom: {
    50: '#6f73ae',
    500: '#283f8c',
    950: '#000000',
  },
}

SCSS

$custom: #283f8c;
$custom-light: #6f73ae;
$custom-dark: #000000;

JSON

{
  "hex": "#283f8c",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 140
  },
  "hsl": {
    "h": 226.2,
    "s": 55.556,
    "l": 35.294
  },
  "oklch": {
    "l": 0.39618,
    "c": 0.13103,
    "h": 267.5
  },
  "luminance": 0.059
}

Semantic roles & 50–950 ramp

primary

#283F8C

secondary

#B6A15A

accent

#BC49DF

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #283F8C

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

Preview Lab → · Contrast checker → · Palette generator →