#281A8F#281A8F

#281A8F is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.6% C 0.178 H 276.3°. Best body text is #FFFFFF at 12.85:1 contrast (WCAG AA passes).

Color values

HEX	#281A8F
RGB	rgb(40, 26, 143)
HSL	hsl(247, 69%, 33%)
HSV	hsv(247, 82%, 56%)
CMYK	cmyk(72%, 81.8%, 0%, 43.9%)
CIE-LAB	lab(20.72, 43.00, -61.19)
CIE-LCH	lch(20.72, 74.79, 305.10°)
OKLab	oklab(33.57% 0.0194 -0.1769)
OKLCH	oklch(33.57% 0.178 276.3)
XYZ	xyz(6.2008, 3.1725, 26.2668)
Luminance	0.0317 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281A8F #818F1A

analogous

#1A478F #281A8F #621A8F

triadic

#281A8F #8F281A #1A8F28

tetradic

#281A8F #8F1A47 #818F1A #1A8F62

square

#281A8F #8F1A47 #818F1A #1A8F62

split-complementary

#281A8F #8F621A #478F1A

monochromatic

#0B0727 #1A115B #281A8F #3623C3 #5846DD

Accessibility & contrast

On white

12.85

#281A8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#281A8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281A8F

12.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281A8F	#FFFFFF	#000000	##FFFFFF
##281A8F	1.00	12.85	1.63	12.85
#FFFFFF	12.85	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003792

Deuteranopia (green-blind)

#002D8D

Tritanopia (blue-blind)

#003E55

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #281a8f;
/* rgb */ color: rgb(40, 26, 143);
/* oklch */ color: oklch(33.6% 0.178 276.3);

Tailwind

colors: {
  custom: {
    50: '#735ab1',
    500: '#281a8f',
    950: '#000000',
  },
}

SCSS

$custom: #281a8f;
$custom-light: #735ab1;
$custom-dark: #000000;

JSON

{
  "hex": "#281a8f",
  "rgb": {
    "r": 40,
    "g": 26,
    "b": 143
  },
  "hsl": {
    "h": 247.179,
    "s": 69.231,
    "l": 33.137
  },
  "oklch": {
    "l": 0.33565,
    "c": 0.17793,
    "h": 276.3
  },
  "luminance": 0.03173
}

Semantic roles & 50–950 ramp

primary

#281A8F

secondary

#B0BF46

accent

#EC3CD7

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #281A8F

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

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