#283F6E#283F6E

#283F6E is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.4% C 0.086 H 263.2°. Best body text is #FFFFFF at 10.36:1 contrast (WCAG AA passes).

Color values

HEX	#283F6E
RGB	rgb(40, 63, 110)
HSL	hsl(220, 47%, 29%)
HSV	hsv(220, 64%, 43%)
CMYK	cmyk(63.6%, 42.7%, 0%, 56.9%)
CIE-LAB	lab(27.11, 7.20, -30.00)
CIE-LCH	lch(27.11, 30.85, 283.49°)
OKLab	oklab(37.4% -0.0102 -0.0853)
OKLCH	oklch(37.4% 0.086 263.2)
XYZ	xyz(5.4661, 5.1314, 15.4512)
Luminance	0.0513 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F6E #6E5728

analogous

#28626E #283F6E #34286E

triadic

#283F6E #6E283F #3F6E28

tetradic

#283F6E #6E2862 #6E5728 #286E34

square

#283F6E #6E2862 #6E5728 #286E34

split-complementary

#283F6E #6E3428 #626E28

monochromatic

#080D16 #182541 #283F6E #38599B #5175C0

Accessibility & contrast

On white

10.36

#283F6E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#283F6E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F6E

10.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F6E	#FFFFFF	#000000	##FFFFFF
##283F6E	1.00	10.36	2.03	10.36
#FFFFFF	10.36	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A4470

Deuteranopia (green-blind)

#213D6D

Tritanopia (blue-blind)

#004A51

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #283f6e;
/* rgb */ color: rgb(40, 63, 110);
/* oklch */ color: oklch(37.4% 0.086 263.2);

Tailwind

colors: {
  custom: {
    50: '#697398',
    500: '#283f6e',
    950: '#000000',
  },
}

SCSS

$custom: #283f6e;
$custom-light: #697398;
$custom-dark: #000000;

JSON

{
  "hex": "#283f6e",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 110
  },
  "hsl": {
    "h": 220.286,
    "s": 46.667,
    "l": 29.412
  },
  "oklch": {
    "l": 0.37395,
    "c": 0.08591,
    "h": 263.2
  },
  "luminance": 0.05132
}

Semantic roles & 50–950 ramp

primary

#283F6E

secondary

#A08651

accent

#AB51D6

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07080D

muted

#7A7B7E

Preview Lab

Preview with #283F6E

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

Preview Lab → · Contrast checker → · Palette generator →