#1F509E#1F509E
#1F509E is a dark, vivid blue. Relative luminance 0.085; OKLCH L 44.4% C 0.138 H 259.5°. Best body text is #FFFFFF at 7.78:1 contrast (WCAG AA passes).
Color values
| HEX | #1F509E |
|---|---|
| RGB | rgb(31, 80, 158) |
| HSL | hsl(217, 67%, 37%) |
| HSV | hsv(217, 80%, 62%) |
| CMYK | cmyk(80.4%, 49.4%, 0%, 38%) |
| CIE-LAB | lab(35.00, 13.07, -47.06) |
| CIE-LCH | lch(35.00, 48.84, 285.52°) |
| OKLab | oklab(44.38% -0.025 -0.1353) |
| OKLCH | oklch(44.38% 0.138 259.5) |
| XYZ | xyz(9.6030, 8.4961, 33.4749) |
| Luminance | 0.0850 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Dusk Blue
#26538D
ΔE00 2.53
Cobalt (survey)
#1E488F
ΔE00 3.07
Sapphire
#0F52BA
ΔE00 3.50
Cobalt
#0047AB
ΔE00 3.55
Light Navy
#155084
ΔE00 4.33
Denim Blue
#3B5B92
ΔE00 4.42
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1F509E #9E6D1F
analogous
#1F909E #1F509E #2D1F9E
triadic
#1F509E #9E1F50 #509E1F
tetradic
#1F509E #9E1F90 #9E6D1F #1F9E2D
square
#1F509E #9E1F90 #9E6D1F #1F9E2D
split-complementary
#1F509E #9E2D1F #909E1F
monochromatic
#0B1C38 #15366B #1F509E #296AD1 #598CDE
Accessibility & contrast
On white
7.78
#1F509E on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.70
#1F509E on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1F509E
7.78:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1F509E | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1F509E | 1.00 | 7.78 | 2.70 | 7.78 |
| #FFFFFF | 7.78 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.70 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 7.78 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#2358A1
Deuteranopia (green-blind)
#004D9C
Tritanopia (blue-blind)
#00636F
Achromatopsia (no color)
#525252
Design tokens & code
CSS
--color: #1f509e; /* rgb */ color: rgb(31, 80, 158); /* oklch */ color: oklch(44.4% 0.138 259.5);
Tailwind
colors: {
custom: {
50: '#6f80bb',
500: '#1f509e',
950: '#000000',
},
}SCSS
$custom: #1f509e; $custom-light: #6f80bb; $custom-dark: #000000;
JSON
{
"hex": "#1f509e",
"rgb": {
"r": 31,
"g": 80,
"b": 158
},
"hsl": {
"h": 216.85,
"s": 67.196,
"l": 37.059
},
"oklch": {
"l": 0.44377,
"c": 0.1376,
"h": 259.5
},
"luminance": 0.08497
}Semantic roles & 50–950 ramp
primary
#1F509E
secondary
#C29956
accent
#A83EEA
background
#F7F7FB
surface
#EDEEF6
border
#C8C9D0
text
#090A12
muted
#7B7C81