#1F4E9B#1F4E9B
#1F4E9B is a dark, vivid blue. Relative luminance 0.081; OKLCH L 43.7% C 0.136 H 259.9°. Best body text is #FFFFFF at 8.01:1 contrast (WCAG AA passes).
Color values
| HEX | #1F4E9B |
|---|---|
| RGB | rgb(31, 78, 155) |
| HSL | hsl(217, 67%, 36%) |
| HSV | hsv(217, 80%, 61%) |
| CMYK | cmyk(80%, 49.7%, 0%, 39.2%) |
| CIE-LAB | lab(34.20, 13.22, -46.53) |
| CIE-LCH | lch(34.20, 48.37, 285.86°) |
| OKLab | oklab(43.7% -0.0239 -0.1338) |
| OKLCH | oklch(43.7% 0.136 259.9) |
| XYZ | xyz(9.2037, 8.1056, 32.0834) |
| Luminance | 0.0811 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cobalt (survey)
#1E488F
ΔE00 2.35
Dusk Blue
#26538D
ΔE00 2.69
Cobalt
#0047AB
ΔE00 3.26
Sapphire
#0F52BA
ΔE00 3.98
Light Navy
#155084
ΔE00 4.32
Denim Blue
#3B5B92
ΔE00 4.81
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1F4E9B #9B6C1F
analogous
#1F8C9B #1F4E9B #2E1F9B
triadic
#1F4E9B #9B1F4E #4E9B1F
tetradic
#1F4E9B #9B1F8C #9B6C1F #1F9B2E
square
#1F4E9B #9B1F8C #9B6C1F #1F9B2E
split-complementary
#1F4E9B #9B2E1F #8C9B1F
monochromatic
#0B1B35 #153468 #1F4E9B #2968CE #578ADD
Accessibility & contrast
On white
8.01
#1F4E9B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.62
#1F4E9B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1F4E9B
8.01:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1F4E9B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1F4E9B | 1.00 | 8.01 | 2.62 | 8.01 |
| #FFFFFF | 8.01 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.62 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.01 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#21569E
Deuteranopia (green-blind)
#004B99
Tritanopia (blue-blind)
#00606D
Achromatopsia (no color)
#505050
Design tokens & code
CSS
--color: #1f4e9b; /* rgb */ color: rgb(31, 78, 155); /* oklch */ color: oklch(43.7% 0.136 259.9);
Tailwind
colors: {
custom: {
50: '#6f7fb9',
500: '#1f4e9b',
950: '#000000',
},
}SCSS
$custom: #1f4e9b; $custom-light: #6f7fb9; $custom-dark: #000000;
JSON
{
"hex": "#1f4e9b",
"rgb": {
"r": 31,
"g": 78,
"b": 155
},
"hsl": {
"h": 217.258,
"s": 66.667,
"l": 36.471
},
"oklch": {
"l": 0.43702,
"c": 0.13591,
"h": 259.9
},
"luminance": 0.08107
}Semantic roles & 50–950 ramp
primary
#1F4E9B
secondary
#C19855
accent
#A93EEA
background
#F7F7FB
surface
#EDEEF6
border
#C8C9D0
text
#080A11
muted
#7B7C80