#283B57#283B57

#283B57 is a dark, muted blue. Relative luminance 0.043; OKLCH L 35.0% C 0.055 H 257.9°. Best body text is #FFFFFF at 11.33:1 contrast (WCAG AA passes).

Color values

HEX#283B57
RGBrgb(40, 59, 87)
HSLhsl(216, 37%, 25%)
HSVhsv(216, 54%, 34%)
CMYKcmyk(54%, 32.2%, 0%, 65.9%)
CIE-LABlab(24.53, 1.47, -19.19)
CIE-LCHlch(24.53, 19.24, 274.38°)
OKLaboklab(34.97% -0.0115 -0.0538)
OKLCHoklch(34.97% 0.055 257.9)
XYZxyz(4.1588, 4.2669, 9.6194)
Luminance0.0427 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#283B57 #574428
analogous
#285257 #283B57 #2D2857
triadic
#283B57 #57283B #3B5728
tetradic
#283B57 #572852 #574428 #28572D
square
#283B57 #572852 #574428 #28572D
split-complementary
#283B57 #572D28 #525728
monochromatic
#0A0E15 #151F2D #283B57 #3B5781 #4F74AB

Accessibility & contrast

On white

11.33
#283B57 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.85
#283B57 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283B57
11.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##283B57#FFFFFF#000000##FFFFFF
##283B571.0011.331.8511.33
#FFFFFF11.331.0021.001.00
#0000001.8521.001.0021.00
##FFFFFF11.331.0021.001.00

Color blindness preview

Protanopia (red-blind)
#303D58
Deuteranopia (green-blind)
#2B3856
Tritanopia (blue-blind)
#124145
Achromatopsia (no color)
#3A3A3A

Design tokens & code

CSS
--color: #283b57;
/* rgb */ color: rgb(40, 59, 87);
/* oklch */ color: oklch(35.0% 0.055 257.9);
Tailwind
colors: {
  custom: {
    50: '#657086',
    500: '#283b57',
    950: '#000000',
  },
}
SCSS
$custom: #283b57;
$custom-light: #657086;
$custom-dark: #000000;
JSON
{
  "hex": "#283b57",
  "rgb": {
    "r": 40,
    "g": 59,
    "b": 87
  },
  "hsl": {
    "h": 215.745,
    "s": 37.008,
    "l": 24.902
  },
  "oklch": {
    "l": 0.34972,
    "c": 0.05506,
    "h": 257.9
  },
  "luminance": 0.04267
}

Semantic roles & 50–950 ramp

primary
#283B57
secondary
#8A7351
accent
#9F5BCD
background
#F6F6F8
surface
#EBECEF
border
#C6C7CA
text
#06070B
muted
#7A7A7C

Preview Lab

Preview with #283B57

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

Preview Lab → · Contrast checker → · Palette generator →

#283B57 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva