#3040B3#3040B3

#3040B3 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.6% C 0.181 H 270.6°. Best body text is #FFFFFF at 8.37:1 contrast (WCAG AA passes).

Color values

HEX	#3040B3
RGB	rgb(48, 64, 179)
HSL	hsl(233, 58%, 45%)
HSV	hsv(233, 73%, 70%)
CMYK	cmyk(73.2%, 64.2%, 0%, 29.8%)
CIE-LAB	lab(33.02, 33.72, -62.78)
CIE-LCH	lch(33.02, 71.26, 298.24°)
OKLab	oklab(43.61% 0.0019 -0.1814)
OKLCH	oklch(43.61% 0.181 270.6)
XYZ	xyz(11.1862, 7.5487, 43.5066)
Luminance	0.0755 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3040B3 #B3A330

analogous

#3081B3 #3040B3 #6230B3

triadic

#3040B3 #B33040 #40B330

tetradic

#3040B3 #B33081 #B3A330 #30B362

square

#3040B3 #B33081 #B3A330 #30B362

split-complementary

#3040B3 #B36230 #81B330

monochromatic

#161D52 #232F83 #3040B3 #5060D0 #808CDD

Accessibility & contrast

On white

8.37

#3040B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#3040B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3040B3

8.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3040B3	#FFFFFF	#000000	##FFFFFF
##3040B3	1.00	8.37	2.51	8.37
#FFFFFF	8.37	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B7

Deuteranopia (green-blind)

#0048B1

Tritanopia (blue-blind)

#005E73

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3040b3;
/* rgb */ color: rgb(48, 64, 179);
/* oklch */ color: oklch(43.6% 0.181 270.6);

Tailwind

colors: {
  custom: {
    50: '#7b75cb',
    500: '#3040b3',
    950: '#000000',
  },
}

SCSS

$custom: #3040b3;
$custom-light: #7b75cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3040b3",
  "rgb": {
    "r": 48,
    "g": 64,
    "b": 179
  },
  "hsl": {
    "h": 232.672,
    "s": 57.709,
    "l": 44.51
  },
  "oklch": {
    "l": 0.43605,
    "c": 0.18145,
    "h": 270.6
  },
  "luminance": 0.0755
}

Semantic roles & 50–950 ramp

primary

#3040B3

secondary

#C6BD79

accent

#CE47E1

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3040B3

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

Preview Lab → · Contrast checker → · Palette generator →