#281AB3#281AB3

#281AB3 is a dark, highly saturated blue. Relative luminance 0.044; OKLCH L 37.8% C 0.220 H 272.4°. Best body text is #FFFFFF at 11.12:1 contrast (WCAG AA passes).

Color values

HEX	#281AB3
RGB	rgb(40, 26, 179)
HSL	hsl(245, 75%, 40%)
HSV	hsv(245, 85%, 70%)
CMYK	cmyk(77.7%, 85.5%, 0%, 29.8%)
CIE-LAB	lab(25.09, 53.95, -75.90)
CIE-LCH	lch(25.09, 93.12, 305.41°)
OKLab	oklab(37.83% 0.0093 -0.2195)
OKLCH	oklch(37.83% 0.22 272.4)
XYZ	xyz(9.3784, 4.4436, 43.0025)
Luminance	0.0445 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#281AB3 #A5B31A

analogous

#1A59B3 #281AB3 #741AB3

triadic

#281AB3 #B3281A #1AB328

tetradic

#281AB3 #B31A59 #A5B31A #1AB374

square

#281AB3 #B31A59 #A5B31A #1AB374

split-complementary

#281AB3 #B3741A #59B31A

monochromatic

#100A48 #1C127E #281AB3 #3B2AE0 #6C60E8

Accessibility & contrast

On white

11.12

#281AB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#281AB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #281AB3

11.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##281AB3	#FFFFFF	#000000	##FFFFFF
##281AB3	1.00	11.12	1.89	11.12
#FFFFFF	11.12	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0042B7

Deuteranopia (green-blind)

#0034B1

Tritanopia (blue-blind)

#004D6A

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #281ab3;
/* rgb */ color: rgb(40, 26, 179);
/* oklch */ color: oklch(37.8% 0.220 272.4);

Tailwind

colors: {
  custom: {
    50: '#7c5dcb',
    500: '#281ab3',
    950: '#000000',
  },
}

SCSS

$custom: #281ab3;
$custom-light: #7c5dcb;
$custom-dark: #000000;

JSON

{
  "hex": "#281ab3",
  "rgb": {
    "r": 40,
    "g": 26,
    "b": 179
  },
  "hsl": {
    "h": 245.49,
    "s": 74.634,
    "l": 40.196
  },
  "oklch": {
    "l": 0.37833,
    "c": 0.2197,
    "h": 272.4
  },
  "luminance": 0.04445
}

Semantic roles & 50–950 ramp

primary

#281AB3

secondary

#C2CC5D

accent

#F137E0

background

#F8F5FC

surface

#F0E9F9

border

#CBC5D2

text

#0C0514

muted

#7D7982

Preview Lab

Preview with #281AB3

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

Preview Lab → · Contrast checker → · Palette generator →