#040739#040739
#040739 is a very dark, moderate blue. Relative luminance 0.005; OKLCH L 17.6% C 0.094 H 268.7°. Best body text is #FFFFFF at 19.19:1 contrast (WCAG AA passes).
Color values
| HEX | #040739 |
|---|---|
| RGB | rgb(4, 7, 57) |
| HSL | hsl(237, 87%, 12%) |
| HSV | hsv(237, 93%, 22%) |
| CMYK | cmyk(93%, 87.7%, 0%, 77.6%) |
| CIE-LAB | lab(4.27, 16.98, -31.06) |
| CIE-LCH | lch(4.27, 35.40, 298.66°) |
| OKLab | oklab(17.65% -0.0022 -0.094) |
| OKLCH | oklch(17.65% 0.094 268.7) |
| XYZ | xyz(0.8643, 0.4731, 3.9159) |
| Luminance | 0.0047 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Midnight Blue (survey)
#020035
ΔE00 1.09
Dark Navy
#000435
ΔE00 1.38
Very Dark Blue
#000133
ΔE00 1.58
Navy Blue (survey)
#001146
ΔE00 2.76
Midnight
#03012D
ΔE00 2.93
Dark Navy Blue
#00022E
ΔE00 2.97
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#040739 #393604
analogous
#042239 #040739 #1C0439
triadic
#040739 #390407 #073904
tetradic
#040739 #390422 #393604 #04391C
square
#040739 #390422 #393604 #04391C
split-complementary
#040739 #391C04 #223904
monochromatic
#02041D #02041D #040739 #080E72 #0C15AB
Accessibility & contrast
On white
19.19
#040739 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.09
#040739 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #040739
19.19:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##040739 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##040739 | 1.00 | 19.19 | 1.09 | 19.19 |
| #FFFFFF | 19.19 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.09 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 19.19 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#00123A
Deuteranopia (green-blind)
#000C38
Tritanopia (blue-blind)
#00161F
Achromatopsia (no color)
#0F0F0F
Design tokens & code
CSS
--color: #040739; /* rgb */ color: rgb(4, 7, 57); /* oklch */ color: oklch(17.6% 0.094 268.7);
Tailwind
colors: {
custom: {
50: '#4e4970',
500: '#040739',
950: '#000000',
},
}SCSS
$custom: #040739; $custom-light: #4e4970; $custom-dark: #000000;
JSON
{
"hex": "#040739",
"rgb": {
"r": 4,
"g": 7,
"b": 57
},
"hsl": {
"h": 236.604,
"s": 86.885,
"l": 11.961
},
"oklch": {
"l": 0.17646,
"c": 0.09404,
"h": 268.7
},
"luminance": 0.00473
}Semantic roles & 50–950 ramp
primary
#040739
secondary
#7B761E
accent
#F12BFD
background
#F4F4F6
surface
#E7E6EC
border
#C3C2C7
text
#020007
muted
#78777A