#4040B2#4040B2
#4040B2 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.5% C 0.176 H 276.5°. Best body text is #FFFFFF at 8.09:1 contrast (WCAG AA passes).
Color values
| HEX | #4040B2 |
|---|---|
| RGB | rgb(64, 64, 178) |
| HSL | hsl(240, 47%, 47%) |
| HSV | hsv(240, 64%, 70%) |
| CMYK | cmyk(64%, 64%, 0%, 30.2%) |
| CIE-LAB | lab(33.92, 35.53, -60.69) |
| CIE-LCH | lch(33.92, 70.32, 300.35°) |
| OKLab | oklab(44.49% 0.02 -0.1749) |
| OKLCH | oklch(44.49% 0.176 276.5) |
| XYZ | xyz(11.9810, 7.9701, 43.0179) |
| Luminance | 0.0797 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Ocean Blue
#4F42B5
ΔE00 2.29
Blue Blue
#2242C7
ΔE00 3.78
Sapphire (survey)
#2138AB
ΔE00 3.86
Blue With A Hint Of Purple
#533CC6
ΔE00 4.27
Blueberry
#464196
ΔE00 4.54
Blurple
#5539CC
ΔE00 5.22
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#4040B2 #B2B240
analogous
#4079B2 #4040B2 #7940B2
triadic
#4040B2 #B24040 #40B240
tetradic
#4040B2 #B24079 #B2B240 #40B279
square
#4040B2 #B24079 #B2B240 #40B279
split-complementary
#4040B2 #B27940 #79B240
monochromatic
#202058 #303085 #4040B2 #6767C8 #9494D8
Accessibility & contrast
On white
8.09
#4040B2 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.59
#4040B2 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #4040B2
8.09:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##4040B2 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##4040B2 | 1.00 | 8.09 | 2.59 | 8.09 |
| #FFFFFF | 8.09 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.59 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.09 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0055B6
Deuteranopia (green-blind)
#004BB0
Tritanopia (blue-blind)
#005D73
Achromatopsia (no color)
#505050
Design tokens & code
CSS
--color: #4040b2; /* rgb */ color: rgb(64, 64, 178); /* oklch */ color: oklch(44.5% 0.176 276.5);
Tailwind
colors: {
custom: {
50: '#8275ca',
500: '#4040b2',
950: '#000000',
},
}SCSS
$custom: #4040b2; $custom-light: #8275ca; $custom-dark: #000000;
JSON
{
"hex": "#4040b2",
"rgb": {
"r": 64,
"g": 64,
"b": 178
},
"hsl": {
"h": 240,
"s": 47.107,
"l": 47.451
},
"oklch": {
"l": 0.44494,
"c": 0.17602,
"h": 276.5
},
"luminance": 0.07971
}Semantic roles & 50–950 ramp
primary
#4040B2
secondary
#C4C48A
accent
#D751D7
background
#F8F7FC
surface
#F0EDF8
border
#CBC8D1
text
#0C0813
muted
#7D7B82