#1C43B4#1C43B4
#1C43B4 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.4% C 0.184 H 264.8°. Best body text is #FFFFFF at 8.36:1 contrast (WCAG AA passes).
Color values
| HEX | #1C43B4 |
|---|---|
| RGB | rgb(28, 67, 180) |
| HSL | hsl(225, 73%, 41%) |
| HSV | hsv(225, 84%, 71%) |
| CMYK | cmyk(84.4%, 62.8%, 0%, 29.4%) |
| CIE-LAB | lab(33.04, 30.21, -63.39) |
| CIE-LCH | lch(33.04, 70.22, 295.49°) |
| OKLab | oklab(43.41% -0.0167 -0.1835) |
| OKLCH | oklch(43.41% 0.184 264.8) |
| XYZ | xyz(10.7213, 7.5551, 44.0644) |
| Luminance | 0.0756 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Blue Blue
#2242C7
ΔE00 2.90
Cobalt
#0047AB
ΔE00 3.07
Sapphire (survey)
#2138AB
ΔE00 3.56
Sapphire
#0F52BA
ΔE00 5.31
Blue (survey)
#0343DF
ΔE00 5.47
Cobalt (survey)
#1E488F
ΔE00 6.06
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1C43B4 #B48D1C
analogous
#1C8FB4 #1C43B4 #411CB4
triadic
#1C43B4 #B41C43 #43B41C
tetradic
#1C43B4 #B41C8F #B48D1C #1CB441
square
#1C43B4 #B41C8F #B48D1C #1CB441
split-complementary
#1C43B4 #B4411C #8FB41C
monochromatic
#0C1C4A #142F7F #1C43B4 #2F5CDF #6485E7
Accessibility & contrast
On white
8.36
#1C43B4 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.51
#1C43B4 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1C43B4
8.36:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1C43B4 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1C43B4 | 1.00 | 8.36 | 2.51 | 8.36 |
| #FFFFFF | 8.36 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.51 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.36 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0055B8
Deuteranopia (green-blind)
#0047B2
Tritanopia (blue-blind)
#006175
Achromatopsia (no color)
#4E4E4E
Design tokens & code
CSS
--color: #1c43b4; /* rgb */ color: rgb(28, 67, 180); /* oklch */ color: oklch(43.4% 0.184 264.8);
Tailwind
colors: {
custom: {
50: '#7576cb',
500: '#1c43b4',
950: '#000000',
},
}SCSS
$custom: #1c43b4; $custom-light: #7576cb; $custom-dark: #000000;
JSON
{
"hex": "#1c43b4",
"rgb": {
"r": 28,
"g": 67,
"b": 180
},
"hsl": {
"h": 224.605,
"s": 73.077,
"l": 40.784
},
"oklch": {
"l": 0.43413,
"c": 0.1843,
"h": 264.8
},
"luminance": 0.07556
}Semantic roles & 50–950 ramp
primary
#1C43B4
secondary
#CCB060
accent
#C138F0
background
#F7F7FC
surface
#EEEDF9
border
#C9C8D2
text
#0A0813
muted
#7C7B82