#283A5F#283A5F

#283A5F is a dark, moderate blue. Relative luminance 0.043; OKLCH L 35.2% C 0.069 H 263.6°. Best body text is #FFFFFF at 11.29:1 contrast (WCAG AA passes).

Color values

HEX	#283A5F
RGB	rgb(40, 58, 95)
HSL	hsl(220, 41%, 26%)
HSV	hsv(220, 58%, 37%)
CMYK	cmyk(57.9%, 38.9%, 0%, 62.7%)
CIE-LAB	lab(24.65, 5.04, -24.23)
CIE-LCH	lch(24.65, 24.75, 281.74°)
OKLab	oklab(35.2% -0.0077 -0.0685)
OKLCH	oklch(35.2% 0.069 263.6)
XYZ	xyz(4.4530, 4.3031, 11.4202)
Luminance	0.0430 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283A5F #5F4D28

analogous

#28565F #283A5F #32285F

triadic

#283A5F #5F283A #3A5F28

tetradic

#283A5F #5F2856 #5F4D28 #285F32

square

#283A5F #5F2856 #5F4D28 #285F32

split-complementary

#283A5F #5F3228 #565F28

monochromatic

#090D16 #162034 #283A5F #3A548A #4D6FB4

Accessibility & contrast

On white

11.29

#283A5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#283A5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283A5F

11.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283A5F	#FFFFFF	#000000	##FFFFFF
##283A5F	1.00	11.29	1.86	11.29
#FFFFFF	11.29	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B3D61

Deuteranopia (green-blind)

#25385E

Tritanopia (blue-blind)

#0A4248

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #283a5f;
/* rgb */ color: rgb(40, 58, 95);
/* oklch */ color: oklch(35.2% 0.069 263.6);

Tailwind

colors: {
  custom: {
    50: '#666f8c',
    500: '#283a5f',
    950: '#000000',
  },
}

SCSS

$custom: #283a5f;
$custom-light: #666f8c;
$custom-dark: #000000;

JSON

{
  "hex": "#283a5f",
  "rgb": {
    "r": 40,
    "g": 58,
    "b": 95
  },
  "hsl": {
    "h": 220.364,
    "s": 40.741,
    "l": 26.471
  },
  "oklch": {
    "l": 0.35204,
    "c": 0.06893,
    "h": 263.6
  },
  "luminance": 0.04303
}

Semantic roles & 50–950 ramp

primary

#283A5F

secondary

#927D51

accent

#A957D1

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#06070C

muted

#7A7A7D

Preview Lab

Preview with #283A5F

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

Preview Lab → · Contrast checker → · Palette generator →