#403BB5#403BB5

#403BB5 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.9% C 0.186 H 277.3°. Best body text is #FFFFFF at 8.36:1 contrast (WCAG AA passes).

Color values

HEX	#403BB5
RGB	rgb(64, 59, 181)
HSL	hsl(242, 51%, 47%)
HSV	hsv(242, 67%, 71%)
CMYK	cmyk(64.6%, 67.4%, 0%, 29%)
CIE-LAB	lab(33.03, 39.59, -63.91)
CIE-LCH	lch(33.03, 75.18, 301.77°)
OKLab	oklab(43.93% 0.0237 -0.1844)
OKLCH	oklch(43.93% 0.186 277.3)
XYZ	xyz(12.0161, 7.5531, 44.5318)
Luminance	0.0755 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 2.65

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#403BB5 #B0B53B

analogous

#3B73B5 #403BB5 #7D3BB5

triadic

#403BB5 #B5403B #3BB540

tetradic

#403BB5 #B53B73 #B0B53B #3BB57D

square

#403BB5 #B53B73 #B0B53B #3BB57D

split-complementary

#403BB5 #B57D3B #73B53B

monochromatic

#1F1D59 #302C87 #403BB5 #6662CC #9390DB

Accessibility & contrast

On white

8.36

#403BB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#403BB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #403BB5

8.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##403BB5	#FFFFFF	#000000	##FFFFFF
##403BB5	1.00	8.36	2.51	8.36
#FFFFFF	8.36	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B9

Deuteranopia (green-blind)

#0048B3

Tritanopia (blue-blind)

#005B73

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #403bb5;
/* rgb */ color: rgb(64, 59, 181);
/* oklch */ color: oklch(43.9% 0.186 277.3);

Tailwind

colors: {
  custom: {
    50: '#8372cc',
    500: '#403bb5',
    950: '#000000',
  },
}

SCSS

$custom: #403bb5;
$custom-light: #8372cc;
$custom-dark: #000000;

JSON

{
  "hex": "#403bb5",
  "rgb": {
    "r": 64,
    "g": 59,
    "b": 181
  },
  "hsl": {
    "h": 242.459,
    "s": 50.833,
    "l": 47.059
  },
  "oklch": {
    "l": 0.4393,
    "c": 0.18588,
    "h": 277.3
  },
  "luminance": 0.07554
}

Semantic roles & 50–950 ramp

primary

#403BB5

secondary

#C3C686

accent

#DA4DD5

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0813

muted

#7D7B82

Preview Lab

Preview with #403BB5

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

Preview Lab → · Contrast checker → · Palette generator →