#284F8E#284F8E

#284F8E is a dark, moderate blue. Relative luminance 0.080; OKLCH L 43.3% C 0.113 H 259.6°. Best body text is #FFFFFF at 8.08:1 contrast (WCAG AA passes).

Color values

HEX	#284F8E
RGB	rgb(40, 79, 142)
HSL	hsl(217, 56%, 36%)
HSV	hsv(217, 72%, 56%)
CMYK	cmyk(71.8%, 44.4%, 0%, 44.3%)
CIE-LAB	lab(33.97, 8.65, -38.99)
CIE-LCH	lch(33.97, 39.94, 282.51°)
OKLab	oklab(43.34% -0.0205 -0.1114)
OKLCH	oklch(43.34% 0.113 259.6)
XYZ	xyz(8.5518, 7.9952, 26.6785)
Luminance	0.0800 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#284F8E #8E6728

analogous

#28828E #284F8E #34288E

triadic

#284F8E #8E284F #4F8E28

tetradic

#284F8E #8E2882 #8E6728 #288E34

square

#284F8E #8E2882 #8E6728 #288E34

split-complementary

#284F8E #8E3428 #828E28

monochromatic

#0D1A2F #1B345E #284F8E #356ABE #5F8BD2

Accessibility & contrast

On white

8.08

#284F8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#284F8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #284F8E

8.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##284F8E	#FFFFFF	#000000	##FFFFFF
##284F8E	1.00	8.08	2.60	8.08
#FFFFFF	8.08	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#305590

Deuteranopia (green-blind)

#1F4C8D

Tritanopia (blue-blind)

#005E67

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #284f8e;
/* rgb */ color: rgb(40, 79, 142);
/* oklch */ color: oklch(43.3% 0.113 259.6);

Tailwind

colors: {
  custom: {
    50: '#6f7faf',
    500: '#284f8e',
    950: '#000000',
  },
}

SCSS

$custom: #284f8e;
$custom-light: #6f7faf;
$custom-dark: #000000;

JSON

{
  "hex": "#284f8e",
  "rgb": {
    "r": 40,
    "g": 79,
    "b": 142
  },
  "hsl": {
    "h": 217.059,
    "s": 56.044,
    "l": 35.686
  },
  "oklch": {
    "l": 0.43343,
    "c": 0.11333,
    "h": 259.6
  },
  "luminance": 0.07996
}

Semantic roles & 50–950 ramp

primary

#284F8E

secondary

#B7945B

accent

#A648DF

background

#F7F7FA

surface

#EDEEF4

border

#C8C9CE

text

#080A10

muted

#7B7C7F

Preview Lab

Preview with #284F8E

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

Preview Lab → · Contrast checker → · Palette generator →