#3040B5#3040B5

#3040B5 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.8% C 0.184 H 270.6°. Best body text is #FFFFFF at 8.31:1 contrast (WCAG AA passes).

Color values

HEX	#3040B5
RGB	rgb(48, 64, 181)
HSL	hsl(233, 58%, 45%)
HSV	hsv(233, 73%, 71%)
CMYK	cmyk(73.5%, 64.6%, 0%, 29%)
CIE-LAB	lab(33.20, 34.44, -63.68)
CIE-LCH	lch(33.20, 72.40, 298.40°)
OKLab	oklab(43.79% 0.0018 -0.1841)
OKLCH	oklch(43.79% 0.184 270.6)
XYZ	xyz(11.3900, 7.6302, 44.5796)
Luminance	0.0763 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3040B5 #B5A530

analogous

#3083B5 #3040B5 #6330B5

triadic

#3040B5 #B53040 #40B530

tetradic

#3040B5 #B53083 #B5A530 #30B563

square

#3040B5 #B53083 #B5A530 #30B563

split-complementary

#3040B5 #B56330 #83B530

monochromatic

#161E54 #232F85 #3040B5 #5161D1 #828DDE

Accessibility & contrast

On white

8.31

#3040B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#3040B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3040B5

8.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3040B5	#FFFFFF	#000000	##FFFFFF
##3040B5	1.00	8.31	2.53	8.31
#FFFFFF	8.31	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B9

Deuteranopia (green-blind)

#0048B3

Tritanopia (blue-blind)

#005F74

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3040b5;
/* rgb */ color: rgb(48, 64, 181);
/* oklch */ color: oklch(43.8% 0.184 270.6);

Tailwind

colors: {
  custom: {
    50: '#7c75cc',
    500: '#3040b5',
    950: '#000000',
  },
}

SCSS

$custom: #3040b5;
$custom-light: #7c75cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3040b5",
  "rgb": {
    "r": 48,
    "g": 64,
    "b": 181
  },
  "hsl": {
    "h": 232.782,
    "s": 58.079,
    "l": 44.902
  },
  "oklch": {
    "l": 0.43788,
    "c": 0.18408,
    "h": 270.6
  },
  "luminance": 0.07631
}

Semantic roles & 50–950 ramp

primary

#3040B5

secondary

#C7BE7A

accent

#CF46E1

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3040B5

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

Preview Lab → · Contrast checker → · Palette generator →