#4037B8#4037B8

#4037B8 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.6% C 0.194 H 277.7°. Best body text is #FFFFFF at 8.55:1 contrast (WCAG AA passes).

Color values

HEX	#4037B8
RGB	rgb(64, 55, 184)
HSL	hsl(244, 54%, 47%)
HSV	hsv(244, 70%, 72%)
CMYK	cmyk(65.2%, 70.1%, 0%, 27.8%)
CIE-LAB	lab(32.44, 42.94, -66.67)
CIE-LCH	lch(32.44, 79.30, 302.78°)
OKLab	oklab(43.59% 0.0262 -0.1924)
OKLCH	oklch(43.59% 0.194 277.7)
XYZ	xyz(12.1295, 7.2820, 46.1045)
Luminance	0.0728 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Ocean Blue

#4F42B5

ΔE00 3.36

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4037B8 #AFB837

analogous

#376FB8 #4037B8 #8137B8

triadic

#4037B8 #B84037 #37B840

tetradic

#4037B8 #B8376F #AFB837 #37B881

square

#4037B8 #B8376F #AFB837 #37B881

split-complementary

#4037B8 #B88137 #6FB837

monochromatic

#1F1B5A #302989 #4037B8 #655DCF #928DDD

Accessibility & contrast

On white

8.55

#4037B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#4037B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4037B8

8.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4037B8	#FFFFFF	#000000	##FFFFFF
##4037B8	1.00	8.55	2.46	8.55
#FFFFFF	8.55	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BC

Deuteranopia (green-blind)

#0047B6

Tritanopia (blue-blind)

#005A73

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #4037b8;
/* rgb */ color: rgb(64, 55, 184);
/* oklch */ color: oklch(43.6% 0.194 277.7);

Tailwind

colors: {
  custom: {
    50: '#846fce',
    500: '#4037b8',
    950: '#000000',
  },
}

SCSS

$custom: #4037b8;
$custom-light: #846fce;
$custom-dark: #000000;

JSON

{
  "hex": "#4037b8",
  "rgb": {
    "r": 64,
    "g": 55,
    "b": 184
  },
  "hsl": {
    "h": 244.186,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.43586,
    "c": 0.19419,
    "h": 277.7
  },
  "luminance": 0.07283
}

Semantic roles & 50–950 ramp

primary

#4037B8

secondary

#C3C784

accent

#DD4AD3

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #4037B8

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

Preview Lab → · Contrast checker → · Palette generator →