#4039BA#4039BA

#4039BA is a dark, vivid blue. Relative luminance 0.076; OKLCH L 44.1% C 0.195 H 277.2°. Best body text is #FFFFFF at 8.36:1 contrast (WCAG AA passes).

Color values

HEX	#4039BA
RGB	rgb(64, 57, 186)
HSL	hsl(243, 53%, 48%)
HSV	hsv(243, 69%, 73%)
CMYK	cmyk(65.6%, 69.4%, 0%, 27.1%)
CIE-LAB	lab(33.05, 42.42, -66.85)
CIE-LCH	lch(33.05, 79.17, 302.40°)
OKLab	oklab(44.08% 0.0245 -0.193)
OKLCH	oklch(44.08% 0.195 277.2)
XYZ	xyz(12.4375, 7.5604, 47.2487)
Luminance	0.0756 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 3.01

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4039BA #B3BA39

analogous

#3972BA #4039BA #8139BA

triadic

#4039BA #BA4039 #39BA40

tetradic

#4039BA #BA3972 #B3BA39 #39BA81

square

#4039BA #BA3972 #B3BA39 #39BA81

split-complementary

#4039BA #BA8139 #72BA39

monochromatic

#201C5C #302B8B #4039BA #6761CF #9490DD

Accessibility & contrast

On white

8.36

#4039BA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#4039BA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4039BA

8.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4039BA	#FFFFFF	#000000	##FFFFFF
##4039BA	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)

#0053BE

Deuteranopia (green-blind)

#0048B8

Tritanopia (blue-blind)

#005C75

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #4039ba;
/* rgb */ color: rgb(64, 57, 186);
/* oklch */ color: oklch(44.1% 0.195 277.2);

Tailwind

colors: {
  custom: {
    50: '#8471d0',
    500: '#4039ba',
    950: '#000000',
  },
}

SCSS

$custom: #4039ba;
$custom-light: #8471d0;
$custom-dark: #000000;

JSON

{
  "hex": "#4039ba",
  "rgb": {
    "r": 64,
    "g": 57,
    "b": 186
  },
  "hsl": {
    "h": 243.256,
    "s": 53.086,
    "l": 47.647
  },
  "oklch": {
    "l": 0.44079,
    "c": 0.1945,
    "h": 277.2
  },
  "luminance": 0.07561
}

Semantic roles & 50–950 ramp

primary

#4039BA

secondary

#C4C887

accent

#DC4BD5

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #4039BA

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

Preview Lab → · Contrast checker → · Palette generator →