#1F479B#1F479B
#1F479B is a dark, vivid blue. Relative luminance 0.072; OKLCH L 42.2% C 0.145 H 262.7°. Best body text is #FFFFFF at 8.63:1 contrast (WCAG AA passes).
Color values
| HEX | #1F479B |
|---|---|
| RGB | rgb(31, 71, 155) |
| HSL | hsl(221, 67%, 36%) |
| HSV | hsv(221, 80%, 61%) |
| CMYK | cmyk(80%, 54.2%, 0%, 39.2%) |
| CIE-LAB | lab(32.18, 17.96, -49.81) |
| CIE-LCH | lch(32.18, 52.95, 289.83°) |
| OKLab | oklab(42.16% -0.0184 -0.1436) |
| OKLCH | oklch(42.16% 0.145 262.7) |
| XYZ | xyz(8.7326, 7.1633, 31.9264) |
| Luminance | 0.0716 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cobalt (survey)
#1E488F
ΔE00 1.99
Cobalt
#0047AB
ΔE00 2.25
Darkish Blue
#014182
ΔE00 4.56
Dusk Blue
#26538D
ΔE00 4.95
Sapphire
#0F52BA
ΔE00 5.11
Twilight Blue
#0A437A
ΔE00 5.42
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1F479B #9B731F
analogous
#1F859B #1F479B #351F9B
triadic
#1F479B #9B1F47 #479B1F
tetradic
#1F479B #9B1F85 #9B731F #1F9B35
square
#1F479B #9B1F85 #9B731F #1F9B35
split-complementary
#1F479B #9B351F #859B1F
monochromatic
#0B1835 #153068 #1F479B #295ECE #5782DD
Accessibility & contrast
On white
8.63
#1F479B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.43
#1F479B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1F479B
8.63:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1F479B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1F479B | 1.00 | 8.63 | 2.43 | 8.63 |
| #FFFFFF | 8.63 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.43 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.63 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#04529E
Deuteranopia (green-blind)
#004699
Tritanopia (blue-blind)
#005C6A
Achromatopsia (no color)
#4C4C4C
Design tokens & code
CSS
--color: #1f479b; /* rgb */ color: rgb(31, 71, 155); /* oklch */ color: oklch(42.2% 0.145 262.7);
Tailwind
colors: {
custom: {
50: '#6f79b9',
500: '#1f479b',
950: '#000000',
},
}SCSS
$custom: #1f479b; $custom-light: #6f79b9; $custom-dark: #000000;
JSON
{
"hex": "#1f479b",
"rgb": {
"r": 31,
"g": 71,
"b": 155
},
"hsl": {
"h": 220.645,
"s": 66.667,
"l": 36.471
},
"oklch": {
"l": 0.42156,
"c": 0.14474,
"h": 262.7
},
"luminance": 0.07164
}Semantic roles & 50–950 ramp
primary
#1F479B
secondary
#C19E55
accent
#B23EEA
background
#F7F7FB
surface
#EDEDF6
border
#C8C8D0
text
#090911
muted
#7B7B80