#281F9C#281F9C

#281F9C is a dark, vivid blue. Relative luminance 0.038; OKLCH L 35.7% C 0.189 H 274.2°. Best body text is #FFFFFF at 11.89:1 contrast (WCAG AA passes).

Color values

HEX	#281F9C
RGB	rgb(40, 31, 156)
HSL	hsl(244, 67%, 37%)
HSV	hsv(244, 80%, 61%)
CMYK	cmyk(74.4%, 80.1%, 0%, 38.8%)
CIE-LAB	lab(23.10, 44.60, -65.27)
CIE-LCH	lch(23.10, 79.06, 304.35°)
OKLab	oklab(35.67% 0.0139 -0.1888)
OKLCH	oklch(35.67% 0.189 274.2)
XYZ	xyz(7.3638, 3.8306, 31.7973)
Luminance	0.0383 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281F9C #939C1F

analogous

#1F559C #281F9C #671F9C

triadic

#281F9C #9C281F #1F9C28

tetradic

#281F9C #9C1F55 #939C1F #1F9C67

square

#281F9C #9C1F55 #939C1F #1F9C67

split-complementary

#281F9C #9C671F #559C1F

monochromatic

#0E0B36 #1B1569 #281F9C #3529CF #6158DE

Accessibility & contrast

On white

11.89

#281F9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#281F9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281F9C

11.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281F9C	#FFFFFF	#000000	##FFFFFF
##281F9C	1.00	11.89	1.77	11.89
#FFFFFF	11.89	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D9F

Deuteranopia (green-blind)

#00319A

Tritanopia (blue-blind)

#00455D

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #281f9c;
/* rgb */ color: rgb(40, 31, 156);
/* oklch */ color: oklch(35.7% 0.189 274.2);

Tailwind

colors: {
  custom: {
    50: '#765ebb',
    500: '#281f9c',
    950: '#000000',
  },
}

SCSS

$custom: #281f9c;
$custom-light: #765ebb;
$custom-dark: #000000;

JSON

{
  "hex": "#281f9c",
  "rgb": {
    "r": 40,
    "g": 31,
    "b": 156
  },
  "hsl": {
    "h": 244.32,
    "s": 66.845,
    "l": 36.667
  },
  "oklch": {
    "l": 0.35665,
    "c": 0.1893,
    "h": 274.2
  },
  "luminance": 0.03831
}

Semantic roles & 50–950 ramp

primary

#281F9C

secondary

#BAC155

accent

#EA3EDD

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #281F9C

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

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