#2F28B3#2F28B3

#2F28B3 is a dark, highly saturated blue. Relative luminance 0.054; OKLCH L 39.8% C 0.207 H 273.8°. Best body text is #FFFFFF at 10.12:1 contrast (WCAG AA passes).

Color values

HEX	#2F28B3
RGB	rgb(47, 40, 179)
HSL	hsl(243, 63%, 43%)
HSV	hsv(243, 78%, 70%)
CMYK	cmyk(73.7%, 77.7%, 0%, 29.8%)
CIE-LAB	lab(27.78, 47.85, -71.42)
CIE-LCH	lch(27.78, 85.97, 303.82°)
OKLab	oklab(39.82% 0.0138 -0.2066)
OKLCH	oklch(39.82% 0.207 273.8)
XYZ	xyz(10.0651, 5.3756, 43.1462)
Luminance	0.0538 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2F28B3 #ACB328

analogous

#2866B3 #2F28B3 #7528B3

triadic

#2F28B3 #B32F28 #28B32F

tetradic

#2F28B3 #B32866 #ACB328 #28B375

square

#2F28B3 #B32866 #ACB328 #28B375

split-complementary

#2F28B3 #B37528 #66B328

monochromatic

#15124F #221D81 #2F28B3 #4B43D5 #7B75E0

Accessibility & contrast

On white

10.12

#2F28B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#2F28B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2F28B3

10.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2F28B3	#FFFFFF	#000000	##FFFFFF
##2F28B3	1.00	10.12	2.08	10.12
#FFFFFF	10.12	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0048B7

Deuteranopia (green-blind)

#003BB1

Tritanopia (blue-blind)

#00526D

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #2f28b3;
/* rgb */ color: rgb(47, 40, 179);
/* oklch */ color: oklch(39.8% 0.207 273.8);

Tailwind

colors: {
  custom: {
    50: '#7d65cb',
    500: '#2f28b3',
    950: '#000000',
  },
}

SCSS

$custom: #2f28b3;
$custom-light: #7d65cb;
$custom-dark: #000000;

JSON

{
  "hex": "#2f28b3",
  "rgb": {
    "r": 47,
    "g": 40,
    "b": 179
  },
  "hsl": {
    "h": 243.022,
    "s": 63.47,
    "l": 42.941
  },
  "oklch": {
    "l": 0.39818,
    "c": 0.20707,
    "h": 273.8
  },
  "luminance": 0.05377
}

Semantic roles & 50–950 ramp

primary

#2F28B3

secondary

#C3C86F

accent

#E641DE

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #2F28B3

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

Preview Lab → · Contrast checker → · Palette generator →