#3A40B3#3A40B3

#3A40B3 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.2% C 0.179 H 274.1°. Best body text is #FFFFFF at 8.19:1 contrast (WCAG AA passes).

Color values

HEX	#3A40B3
RGB	rgb(58, 64, 179)
HSL	hsl(237, 51%, 46%)
HSV	hsv(237, 68%, 70%)
CMYK	cmyk(67.6%, 64.2%, 0%, 29.8%)
CIE-LAB	lab(33.60, 35.00, -61.81)
CIE-LCH	lch(33.60, 71.03, 299.52°)
OKLab	oklab(44.19% 0.0128 -0.1783)
OKLCH	oklch(44.19% 0.179 274.1)
XYZ	xyz(11.7123, 7.8199, 43.5313)
Luminance	0.0782 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3A40B3 #B3AD3A

analogous

#3A7DB3 #3A40B3 #713AB3

triadic

#3A40B3 #B33A40 #40B33A

tetradic

#3A40B3 #B33A7D #B3AD3A #3AB371

square

#3A40B3 #B33A7D #B3AD3A #3AB371

split-complementary

#3A40B3 #B3713A #7DB33A

monochromatic

#1C1F57 #2B2F85 #3A40B3 #5F64CB #8D91DA

Accessibility & contrast

On white

8.19

#3A40B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#3A40B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3A40B3

8.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3A40B3	#FFFFFF	#000000	##FFFFFF
##3A40B3	1.00	8.19	2.56	8.19
#FFFFFF	8.19	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B7

Deuteranopia (green-blind)

#004AB1

Tritanopia (blue-blind)

#005E73

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3a40b3;
/* rgb */ color: rgb(58, 64, 179);
/* oklch */ color: oklch(44.2% 0.179 274.1);

Tailwind

colors: {
  custom: {
    50: '#7f75cb',
    500: '#3a40b3',
    950: '#000000',
  },
}

SCSS

$custom: #3a40b3;
$custom-light: #7f75cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3a40b3",
  "rgb": {
    "r": 58,
    "g": 64,
    "b": 179
  },
  "hsl": {
    "h": 237.025,
    "s": 51.055,
    "l": 46.471
  },
  "oklch": {
    "l": 0.44185,
    "c": 0.17881,
    "h": 274.1
  },
  "luminance": 0.07821
}

Semantic roles & 50–950 ramp

primary

#3A40B3

secondary

#C5C284

accent

#D44DDB

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3A40B3

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

Preview Lab → · Contrast checker → · Palette generator →