#283F4F#283F4F
#283F4F is a dark, muted cyan. Relative luminance 0.046; OKLCH L 35.6% C 0.040 H 239.7°. Best body text is #FFFFFF at 10.97:1 contrast (WCAG AA passes).
Color values
| HEX | #283F4F |
|---|---|
| RGB | rgb(40, 63, 79) |
| HSL | hsl(205, 33%, 23%) |
| HSV | hsv(205, 49%, 31%) |
| CMYK | cmyk(49.4%, 20.3%, 0%, 69%) |
| CIE-LAB | lab(25.47, -3.94, -12.48) |
| CIE-LCH | lch(25.47, 13.09, 252.50°) |
| OKLab | oklab(35.58% -0.0202 -0.0346) |
| OKLCH | oklch(35.58% 0.04 239.7) |
| XYZ | xyz(4.0634, 4.5704, 8.0637) |
| Luminance | 0.0457 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Dark Blue Grey
#1F3B4D
ΔE00 1.83
Dark Grey Blue
#29465B
ΔE00 2.95
Charcoal
#36454F
ΔE00 3.78
Dark Slate Blue
#214761
ΔE00 4.54
Gunmetal
#2A3439
ΔE00 6.55
Charcoal Grey
#3C4142
ΔE00 8.69
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#283F4F #4F3828
analogous
#284F4B #283F4F #282B4F
triadic
#283F4F #4F283F #3F4F28
tetradic
#283F4F #4B284F #4F3828 #2B4F28
square
#283F4F #4B284F #4F3828 #2B4F28
split-complementary
#283F4F #4F282B #4F4B28
monochromatic
#0A1014 #131F26 #283F4F #3D5F78 #5180A0
Accessibility & contrast
On white
10.97
#283F4F on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.91
#283F4F on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #283F4F
10.97:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##283F4F | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##283F4F | 1.00 | 10.97 | 1.91 | 10.97 |
| #FFFFFF | 10.97 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.91 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 10.97 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#383F50
Deuteranopia (green-blind)
#333B4F
Tritanopia (blue-blind)
#174344
Achromatopsia (no color)
#3C3C3C
Design tokens & code
CSS
--color: #283f4f; /* rgb */ color: rgb(40, 63, 79); /* oklch */ color: oklch(35.6% 0.040 239.7);
Tailwind
colors: {
custom: {
50: '#647480',
500: '#283f4f',
950: '#000000',
},
}SCSS
$custom: #283f4f; $custom-light: #647480; $custom-dark: #000000;
JSON
{
"hex": "#283f4f",
"rgb": {
"r": 40,
"g": 63,
"b": 79
},
"hsl": {
"h": 204.615,
"s": 32.773,
"l": 23.333
},
"oklch": {
"l": 0.35584,
"c": 0.04008,
"h": 239.7
},
"luminance": 0.04571
}Semantic roles & 50–950 ramp
primary
#283F4F
secondary
#826551
accent
#8A5FC9
background
#F6F7F7
surface
#EBEDEE
border
#C6C8C9
text
#05080A
muted
#7A7B7C