#283F64#283F64
#283F64 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 36.8% C 0.070 H 259.5°. Best body text is #FFFFFF at 10.58:1 contrast (WCAG AA passes).
Color values
| HEX | #283F64 |
|---|---|
| RGB | rgb(40, 63, 100) |
| HSL | hsl(217, 43%, 27%) |
| HSV | hsv(217, 60%, 39%) |
| CMYK | cmyk(60%, 37%, 0%, 60.8%) |
| CIE-LAB | lab(26.52, 3.46, -24.52) |
| CIE-LCH | lch(26.52, 24.76, 278.03°) |
| OKLab | oklab(36.75% -0.0128 -0.0693) |
| OKLCH | oklch(36.75% 0.07 259.5) |
| XYZ | xyz(4.9520, 4.9258, 12.7439) |
| Luminance | 0.0493 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Marine Blue
#01386A
ΔE00 4.50
Twilight Blue
#0A437A
ΔE00 5.05
Darkish Blue
#014182
ΔE00 5.59
Prussian Blue
#004577
ΔE00 5.91
Marine
#042E60
ΔE00 5.91
Cobalt (survey)
#1E488F
ΔE00 6.72
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#283F64 #644D28
analogous
#285D64 #283F64 #2F2864
triadic
#283F64 #64283F #3F6428
tetradic
#283F64 #64285D #644D28 #28642F
square
#283F64 #64285D #644D28 #28642F
split-complementary
#283F64 #642F28 #5D6428
monochromatic
#090E16 #172338 #283F64 #395B90 #4E77B8
Accessibility & contrast
On white
10.58
#283F64 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.99
#283F64 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #283F64
10.58:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##283F64 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##283F64 | 1.00 | 10.58 | 1.99 | 10.58 |
| #FFFFFF | 10.58 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.99 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 10.58 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#304266
Deuteranopia (green-blind)
#283C63
Tritanopia (blue-blind)
#00474C
Achromatopsia (no color)
#3F3F3F
Design tokens & code
CSS
--color: #283f64; /* rgb */ color: rgb(40, 63, 100); /* oklch */ color: oklch(36.8% 0.070 259.5);
Tailwind
colors: {
custom: {
50: '#677390',
500: '#283f64',
950: '#000000',
},
}SCSS
$custom: #283f64; $custom-light: #677390; $custom-dark: #000000;
JSON
{
"hex": "#283f64",
"rgb": {
"r": 40,
"g": 63,
"b": 100
},
"hsl": {
"h": 217,
"s": 42.857,
"l": 27.451
},
"oklch": {
"l": 0.36752,
"c": 0.07045,
"h": 259.5
},
"luminance": 0.04926
}Semantic roles & 50–950 ramp
primary
#283F64
secondary
#977C51
accent
#A355D3
background
#F6F6F8
surface
#EBECF0
border
#C6C7CB
text
#06080C
muted
#7A7B7D