#283FAD#283FAD
#283FAD is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.5% C 0.177 H 268.4°. Best body text is #FFFFFF at 8.73:1 contrast (WCAG AA passes).
Color values
| HEX | #283FAD |
|---|---|
| RGB | rgb(40, 63, 173) |
| HSL | hsl(230, 62%, 42%) |
| HSV | hsv(230, 77%, 68%) |
| CMYK | cmyk(76.9%, 63.6%, 0%, 32.2%) |
| CIE-LAB | lab(31.86, 31.27, -61.14) |
| CIE-LCH | lch(31.86, 68.67, 297.09°) |
| OKLab | oklab(42.48% -0.005 -0.1768) |
| OKLCH | oklch(42.48% 0.177 268.4) |
| XYZ | xyz(10.1928, 7.0221, 40.3453) |
| Luminance | 0.0702 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 2.04
Blue Blue
#2242C7
ΔE00 3.50
Cobalt
#0047AB
ΔE00 4.43
Ocean Blue
#4F42B5
ΔE00 5.34
Blueberry
#464196
ΔE00 5.38
Blue (survey)
#0343DF
ΔE00 6.33
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#283FAD #AD9628
analogous
#2882AD #283FAD #5428AD
triadic
#283FAD #AD283F #3FAD28
tetradic
#283FAD #AD2882 #AD9628 #28AD54
square
#283FAD #AD2882 #AD9628 #28AD54
split-complementary
#283FAD #AD5428 #82AD28
monochromatic
#111B4A #1D2D7B #283FAD #3F59D3 #7184DE
Accessibility & contrast
On white
8.73
#283FAD on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.40
#283FAD on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #283FAD
8.73:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##283FAD | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##283FAD | 1.00 | 8.73 | 2.40 | 8.73 |
| #FFFFFF | 8.73 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.40 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.73 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0051B1
Deuteranopia (green-blind)
#0045AB
Tritanopia (blue-blind)
#005C70
Achromatopsia (no color)
#4B4B4B
Design tokens & code
CSS
--color: #283fad; /* rgb */ color: rgb(40, 63, 173); /* oklch */ color: oklch(42.5% 0.177 268.4);
Tailwind
colors: {
custom: {
50: '#7774c6',
500: '#283fad',
950: '#000000',
},
}SCSS
$custom: #283fad; $custom-light: #7774c6; $custom-dark: #000000;
JSON
{
"hex": "#283fad",
"rgb": {
"r": 40,
"g": 63,
"b": 173
},
"hsl": {
"h": 229.624,
"s": 62.441,
"l": 41.765
},
"oklch": {
"l": 0.42476,
"c": 0.17687,
"h": 268.4
},
"luminance": 0.07023
}Semantic roles & 50–950 ramp
primary
#283FAD
secondary
#C5B66C
accent
#C942E6
background
#F7F7FC
surface
#EEEDF8
border
#C9C8D1
text
#0A0813
muted
#7C7B82