#243BB1#243BB1
#243BB1 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 42.0% C 0.188 H 268.0°. Best body text is #FFFFFF at 8.99:1 contrast (WCAG AA passes).
Color values
| HEX | #243BB1 |
|---|---|
| RGB | rgb(36, 59, 177) |
| HSL | hsl(230, 66%, 42%) |
| HSV | hsv(230, 80%, 69%) |
| CMYK | cmyk(79.7%, 66.7%, 0%, 30.6%) |
| CIE-LAB | lab(31.06, 34.96, -64.84) |
| CIE-LCH | lch(31.06, 73.67, 298.33°) |
| OKLab | oklab(41.95% -0.0064 -0.1877) |
| OKLCH | oklch(41.95% 0.188 268) |
| XYZ | xyz(10.2246, 6.6761, 42.3362) |
| Luminance | 0.0668 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 1.16
Blue Blue
#2242C7
ΔE00 3.44
Ocean Blue
#4F42B5
ΔE00 5.39
Cobalt
#0047AB
ΔE00 5.45
Blueberry
#464196
ΔE00 5.97
Blue (survey)
#0343DF
ΔE00 6.13
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#243BB1 #B19A24
analogous
#2482B1 #243BB1 #5424B1
triadic
#243BB1 #B1243B #3BB124
tetradic
#243BB1 #B12482 #B19A24 #24B154
square
#243BB1 #B12482 #B19A24 #24B154
split-complementary
#243BB1 #B15424 #82B124
monochromatic
#0F194B #1A2A7E #243BB1 #3B55D7 #6E81E1
Accessibility & contrast
On white
8.99
#243BB1 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.34
#243BB1 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #243BB1
8.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##243BB1 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##243BB1 | 1.00 | 8.99 | 2.34 | 8.99 |
| #FFFFFF | 8.99 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.34 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.99 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0050B5
Deuteranopia (green-blind)
#0042AF
Tritanopia (blue-blind)
#005B71
Achromatopsia (no color)
#494949
Design tokens & code
CSS
--color: #243bb1; /* rgb */ color: rgb(36, 59, 177); /* oklch */ color: oklch(42.0% 0.188 268.0);
Tailwind
colors: {
custom: {
50: '#7771c9',
500: '#243bb1',
950: '#000000',
},
}SCSS
$custom: #243bb1; $custom-light: #7771c9; $custom-dark: #000000;
JSON
{
"hex": "#243bb1",
"rgb": {
"r": 36,
"g": 59,
"b": 177
},
"hsl": {
"h": 230.213,
"s": 66.197,
"l": 41.765
},
"oklch": {
"l": 0.41952,
"c": 0.18785,
"h": 268
},
"luminance": 0.06677
}Semantic roles & 50–950 ramp
primary
#243BB1
secondary
#C8B869
accent
#CD3FE9
background
#F8F6FC
surface
#EFECF8
border
#CAC7D1
text
#0A0713
muted
#7C7A82