#283D5F#283D5F
#283D5F is a dark, moderate blue. Relative luminance 0.046; OKLCH L 35.9% C 0.065 H 259.7°. Best body text is #FFFFFF at 10.92:1 contrast (WCAG AA passes).
Color values
| HEX | #283D5F |
|---|---|
| RGB | rgb(40, 61, 95) |
| HSL | hsl(217, 41%, 26%) |
| HSV | hsv(217, 58%, 37%) |
| CMYK | cmyk(57.9%, 35.8%, 0%, 62.7%) |
| CIE-LAB | lab(25.61, 2.99, -22.73) |
| CIE-LCH | lch(25.61, 22.92, 277.49°) |
| OKLab | oklab(35.95% -0.0117 -0.0641) |
| OKLCH | oklch(35.95% 0.065 259.7) |
| XYZ | xyz(4.6087, 4.6145, 11.4721) |
| Luminance | 0.0461 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Marine Blue
#01386A
ΔE00 4.85
Marine
#042E60
ΔE00 5.79
Twilight Blue
#0A437A
ΔE00 5.91
Navy Blue
#1B2A4A
ΔE00 6.28
Darkish Blue
#014182
ΔE00 6.47
Prussian Blue
#004577
ΔE00 6.65
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#283D5F #5F4A28
analogous
#28595F #283D5F #2F285F
triadic
#283D5F #5F283D #3D5F28
tetradic
#283D5F #5F2859 #5F4A28 #285F2F
square
#283D5F #5F2859 #5F4A28 #285F2F
split-complementary
#283D5F #5F2F28 #595F28
monochromatic
#090E16 #162134 #283D5F #3A598A #4D75B4
Accessibility & contrast
On white
10.92
#283D5F on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.92
#283D5F on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #283D5F
10.92:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##283D5F | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##283D5F | 1.00 | 10.92 | 1.92 | 10.92 |
| #FFFFFF | 10.92 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.92 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 10.92 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#2F3F60
Deuteranopia (green-blind)
#293A5E
Tritanopia (blue-blind)
#094549
Achromatopsia (no color)
#3D3D3D
Design tokens & code
CSS
--color: #283d5f; /* rgb */ color: rgb(40, 61, 95); /* oklch */ color: oklch(35.9% 0.065 259.7);
Tailwind
colors: {
custom: {
50: '#66728c',
500: '#283d5f',
950: '#000000',
},
}SCSS
$custom: #283d5f; $custom-light: #66728c; $custom-dark: #000000;
JSON
{
"hex": "#283d5f",
"rgb": {
"r": 40,
"g": 61,
"b": 95
},
"hsl": {
"h": 217.091,
"s": 40.741,
"l": 26.471
},
"oklch": {
"l": 0.35949,
"c": 0.06513,
"h": 259.7
},
"luminance": 0.04615
}Semantic roles & 50–950 ramp
primary
#283D5F
secondary
#927951
accent
#A257D1
background
#F6F6F8
surface
#EBECF0
border
#C6C7CB
text
#06070C
muted
#7A7A7D