#2B3FA5#2B3FA5

#2B3FA5 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.9% C 0.165 H 269.3°. Best body text is #FFFFFF at 8.91:1 contrast (WCAG AA passes).

Color values

HEX	#2B3FA5
RGB	rgb(43, 63, 165)
HSL	hsl(230, 59%, 41%)
HSV	hsv(230, 74%, 65%)
CMYK	cmyk(73.9%, 61.8%, 0%, 35.3%)
CIE-LAB	lab(31.31, 28.63, -57.23)
CIE-LCH	lch(31.31, 63.99, 296.58°)
OKLab	oklab(41.9% -0.002 -0.1653)
OKLCH	oklch(41.9% 0.165 269.3)
XYZ	xyz(9.5630, 6.7842, 36.3955)
Luminance	0.0678 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2B3FA5 #A5912B

analogous

#2B7CA5 #2B3FA5 #542BA5

triadic

#2B3FA5 #A52B3F #3FA52B

tetradic

#2B3FA5 #A52B7C #A5912B #2BA554

square

#2B3FA5 #A52B7C #A5912B #2BA554

split-complementary

#2B3FA5 #A5542B #7CA52B

monochromatic

#121A44 #1E2C74 #2B3FA5 #4057CD #7182DA

Accessibility & contrast

On white

8.91

#2B3FA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#2B3FA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2B3FA5

8.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2B3FA5	#FFFFFF	#000000	##FFFFFF
##2B3FA5	1.00	8.91	2.36	8.91
#FFFFFF	8.91	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA8

Deuteranopia (green-blind)

#0044A3

Tritanopia (blue-blind)

#00596C

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #2b3fa5;
/* rgb */ color: rgb(43, 63, 165);
/* oklch */ color: oklch(41.9% 0.165 269.3);

Tailwind

colors: {
  custom: {
    50: '#7673c1',
    500: '#2b3fa5',
    950: '#000000',
  },
}

SCSS

$custom: #2b3fa5;
$custom-light: #7673c1;
$custom-dark: #000000;

JSON

{
  "hex": "#2b3fa5",
  "rgb": {
    "r": 43,
    "g": 63,
    "b": 165
  },
  "hsl": {
    "h": 230.164,
    "s": 58.654,
    "l": 40.784
  },
  "oklch": {
    "l": 0.41898,
    "c": 0.16529,
    "h": 269.3
  },
  "luminance": 0.06785
}

Semantic roles & 50–950 ramp

primary

#2B3FA5

secondary

#C1B36B

accent

#C846E2

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #2B3FA5

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

Preview Lab → · Contrast checker → · Palette generator →