#042540#042540
#042540 is a dark, moderate cyan. Relative luminance 0.017; OKLCH L 25.8% C 0.063 H 247.8°. Best body text is #FFFFFF at 15.63:1 contrast (WCAG AA passes).
Color values
| HEX | #042540 |
|---|---|
| RGB | rgb(4, 37, 64) |
| HSL | hsl(207, 88%, 13%) |
| HSV | hsv(207, 94%, 25%) |
| CMYK | cmyk(93.8%, 42.2%, 0%, 74.9%) |
| CIE-LAB | lab(13.94, 0.08, -20.46) |
| CIE-LCH | lch(13.94, 20.46, 270.22°) |
| OKLab | oklab(25.76% -0.0239 -0.0584) |
| OKLCH | oklch(25.76% 0.063 247.8) |
| XYZ | xyz(1.6367, 1.7189, 5.0950) |
| Luminance | 0.0172 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Navy Blue
#1B2A4A
ΔE00 5.31
Marine
#042E60
ΔE00 5.89
Dark
#1B2431
ΔE00 6.36
Marine Blue
#01386A
ΔE00 7.77
Navy (survey)
#01153E
ΔE00 7.95
Dark Blue Grey
#1F3B4D
ΔE00 8.72
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#042540 #401F04
analogous
#04403D #042540 #040740
triadic
#042540 #400425 #254004
tetradic
#042540 #3D0440 #401F04 #074004
square
#042540 #3D0440 #401F04 #074004
split-complementary
#042540 #400407 #403D04
monochromatic
#02111D #02111D #042540 #08467A #0B68B3
Accessibility & contrast
On white
15.63
#042540 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.34
#042540 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #042540
15.63:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##042540 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##042540 | 1.00 | 15.63 | 1.34 | 15.63 |
| #FFFFFF | 15.63 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.34 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 15.63 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#182641
Deuteranopia (green-blind)
#0F213F
Tritanopia (blue-blind)
#002C2F
Achromatopsia (no color)
#232323
Design tokens & code
CSS
--color: #042540; /* rgb */ color: rgb(4, 37, 64); /* oklch */ color: oklch(25.8% 0.063 247.8);
Tailwind
colors: {
custom: {
50: '#505f75',
500: '#042540',
950: '#000000',
},
}SCSS
$custom: #042540; $custom-light: #505f75; $custom-dark: #000000;
JSON
{
"hex": "#042540",
"rgb": {
"r": 4,
"g": 37,
"b": 64
},
"hsl": {
"h": 207,
"s": 88.235,
"l": 13.333
},
"oklch": {
"l": 0.25755,
"c": 0.06306,
"h": 247.8
},
"luminance": 0.01719
}Semantic roles & 50–950 ramp
primary
#042540
secondary
#814B1F
accent
#8929FE
background
#F4F5F7
surface
#E7E9ED
border
#C3C5C8
text
#020408
muted
#78797B