#4040BF#4040BF

#4040BF is a mid, vivid blue. Relative luminance 0.085; OKLCH L 45.7% C 0.193 H 275.6°. Best body text is #FFFFFF at 7.77:1 contrast (WCAG AA passes).

Color values

HEX	#4040BF
RGB	rgb(64, 64, 191)
HSL	hsl(240, 50%, 50%)
HSV	hsv(240, 66%, 75%)
CMYK	cmyk(66.5%, 66.5%, 0%, 25.1%)
CIE-LAB	lab(35.04, 39.91, -66.53)
CIE-LCH	lch(35.04, 77.58, 300.96°)
OKLab	oklab(45.65% 0.0188 -0.192)
OKLCH	oklch(45.65% 0.193 275.6)
XYZ	xyz(13.3486, 8.5172, 50.2206)
Luminance	0.0852 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4040BF #BFBF40

analogous

#407FBF #4040BF #7F40BF

triadic

#4040BF #BF4040 #40BF40

tetradic

#4040BF #BF4080 #BFBF40 #40BF80

square

#4040BF #BF4080 #BFBF40 #40BF80

split-complementary

#4040BF #BF8040 #80BF40

monochromatic

#212163 #313191 #4040BF #6E6ECE #9C9CDE

Accessibility & contrast

On white

7.77

#4040BF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.70

#4040BF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4040BF

7.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4040BF	#FFFFFF	#000000	##FFFFFF
##4040BF	1.00	7.77	2.70	7.77
#FFFFFF	7.77	1.00	21.00	1.00
#000000	2.70	21.00	1.00	21.00
##FFFFFF	7.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058C3

Deuteranopia (green-blind)

#004DBD

Tritanopia (blue-blind)

#00617A

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #4040bf;
/* rgb */ color: rgb(64, 64, 191);
/* oklch */ color: oklch(45.7% 0.193 275.6);

Tailwind

colors: {
  custom: {
    50: '#8575d3',
    500: '#4040bf',
    950: '#000000',
  },
}

SCSS

$custom: #4040bf;
$custom-light: #8575d3;
$custom-dark: #000000;

JSON

{
  "hex": "#4040bf",
  "rgb": {
    "r": 64,
    "g": 64,
    "b": 191
  },
  "hsl": {
    "h": 240,
    "s": 49.804,
    "l": 50
  },
  "oklch": {
    "l": 0.45652,
    "c": 0.19294,
    "h": 275.6
  },
  "luminance": 0.08518
}

Semantic roles & 50–950 ramp

primary

#4040BF

secondary

#CACA91

accent

#D94ED9

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #4040BF

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

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