#284C8F#284C8F

#284C8F is a dark, moderate blue. Relative luminance 0.076; OKLCH L 42.7% C 0.119 H 261.6°. Best body text is #FFFFFF at 8.33:1 contrast (WCAG AA passes).

Color values

HEX	#284C8F
RGB	rgb(40, 76, 143)
HSL	hsl(219, 56%, 36%)
HSV	hsv(219, 72%, 56%)
CMYK	cmyk(72%, 46.9%, 0%, 43.9%)
CIE-LAB	lab(33.14, 11.04, -40.93)
CIE-LCH	lch(33.14, 42.40, 285.10°)
OKLab	oklab(42.72% -0.0174 -0.1172)
OKLCH	oklch(42.72% 0.119 261.6)
XYZ	xyz(8.4157, 7.6023, 27.0051)
Luminance	0.0760 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284C8F #8F6B28

analogous

#287F8F #284C8F #37288F

triadic

#284C8F #8F284C #4C8F28

tetradic

#284C8F #8F287F #8F6B28 #288F37

square

#284C8F #8F287F #8F6B28 #288F37

split-complementary

#284C8F #8F3728 #7F8F28

monochromatic

#0D192F #1B335F #284C8F #3565BF #5F87D2

Accessibility & contrast

On white

8.33

#284C8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#284C8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284C8F

8.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284C8F	#FFFFFF	#000000	##FFFFFF
##284C8F	1.00	8.33	2.52	8.33
#FFFFFF	8.33	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A5392

Deuteranopia (green-blind)

#154A8E

Tritanopia (blue-blind)

#005C66

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #284c8f;
/* rgb */ color: rgb(40, 76, 143);
/* oklch */ color: oklch(42.7% 0.119 261.6);

Tailwind

colors: {
  custom: {
    50: '#6f7db0',
    500: '#284c8f',
    950: '#000000',
  },
}

SCSS

$custom: #284c8f;
$custom-light: #6f7db0;
$custom-dark: #000000;

JSON

{
  "hex": "#284c8f",
  "rgb": {
    "r": 40,
    "g": 76,
    "b": 143
  },
  "hsl": {
    "h": 219.029,
    "s": 56.284,
    "l": 35.882
  },
  "oklch": {
    "l": 0.42722,
    "c": 0.11851,
    "h": 261.6
  },
  "luminance": 0.07603
}

Semantic roles & 50–950 ramp

primary

#284C8F

secondary

#B8975B

accent

#AB48E0

background

#F7F7FA

surface

#EDEEF5

border

#C8C9CF

text

#080910

muted

#7B7B7F

Preview Lab

Preview with #284C8F

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

Preview Lab → · Contrast checker → · Palette generator →