#1F4F9D#1F4F9D
#1F4F9D is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.1% C 0.137 H 259.8°. Best body text is #FFFFFF at 7.88:1 contrast (WCAG AA passes).
Color values
| HEX | #1F4F9D |
|---|---|
| RGB | rgb(31, 79, 157) |
| HSL | hsl(217, 67%, 37%) |
| HSV | hsv(217, 80%, 62%) |
| CMYK | cmyk(80.3%, 49.7%, 0%, 38.4%) |
| CIE-LAB | lab(34.63, 13.34, -47.04) |
| CIE-LCH | lch(34.63, 48.90, 285.83°) |
| OKLab | oklab(44.08% -0.0244 -0.1353) |
| OKLCH | oklch(44.08% 0.137 259.8) |
| XYZ | xyz(9.4446, 8.3165, 32.9992) |
| Luminance | 0.0832 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Dusk Blue
#26538D
ΔE00 2.65
Cobalt (survey)
#1E488F
ΔE00 2.74
Cobalt
#0047AB
ΔE00 3.34
Sapphire
#0F52BA
ΔE00 3.67
Light Navy
#155084
ΔE00 4.37
Denim Blue
#3B5B92
ΔE00 4.62
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1F4F9D #9D6D1F
analogous
#1F8E9D #1F4F9D #2E1F9D
triadic
#1F4F9D #9D1F4F #4F9D1F
tetradic
#1F4F9D #9D1F8E #9D6D1F #1F9D2E
square
#1F4F9D #9D1F8E #9D6D1F #1F9D2E
split-complementary
#1F4F9D #9D2E1F #8E9D1F
monochromatic
#0B1C37 #15356A #1F4F9D #2969D0 #588BDE
Accessibility & contrast
On white
7.88
#1F4F9D on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.66
#1F4F9D on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1F4F9D
7.88:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1F4F9D | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1F4F9D | 1.00 | 7.88 | 2.66 | 7.88 |
| #FFFFFF | 7.88 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.66 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 7.88 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#2158A0
Deuteranopia (green-blind)
#004C9B
Tritanopia (blue-blind)
#00626E
Achromatopsia (no color)
#515151
Design tokens & code
CSS
--color: #1f4f9d; /* rgb */ color: rgb(31, 79, 157); /* oklch */ color: oklch(44.1% 0.137 259.8);
Tailwind
colors: {
custom: {
50: '#6f7fba',
500: '#1f4f9d',
950: '#000000',
},
}SCSS
$custom: #1f4f9d; $custom-light: #6f7fba; $custom-dark: #000000;
JSON
{
"hex": "#1f4f9d",
"rgb": {
"r": 31,
"g": 79,
"b": 157
},
"hsl": {
"h": 217.143,
"s": 67.021,
"l": 36.863
},
"oklch": {
"l": 0.44077,
"c": 0.13746,
"h": 259.8
},
"luminance": 0.08318
}Semantic roles & 50–950 ramp
primary
#1F4F9D
secondary
#C29956
accent
#A83EEA
background
#F7F7FB
surface
#EDEEF6
border
#C8C9D0
text
#090A12
muted
#7B7C81