#1F3464
Closest named color: Marine Blue (#01386A). oklch(33.5% 0.089 264.4), rgb(31, 52, 100).
Aa
White text reads best on this color (12.11:1).
About this color
#1F3464 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.089 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.024 away. White text reads best on it, at 12.11:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.73:1 |
| White text | 12.11:1 |
Values
| HEX | #1F3464 |
| RGB | rgb(31, 52, 100) |
| HSL | hsl(222, 53%, 26%) |
| OKLCH | oklch(33.5% 0.089 264.4) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #1F3464 | 12.11:1 | AAA | Lc -101.0 | Preferred for body text |
| Black text on #1F3464 | 1.73:1 | Fails | Lc 0.0 | Not readable |
| #1F3464 text on white | 12.11:1 | AAA | Lc 97.5 | Preferred for body text |
| #1F3464 text on black | 1.73:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 900.
-
Step 50
50
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CDD9F2
oklch(88.4% 0.037 265.1)
-
Step 300
300
#ABC1ED
oklch(80.9% 0.067 264.1)
-
Step 400
400
#7F9FE3
oklch(70.6% 0.106 264.5)
-
Step 500
500
#5F86DB
oklch(63% 0.136 264.3)
-
Step 600
600
#466EC9
oklch(55.6% 0.148 264.3)
-
Step 700
700
#385CAE
oklch(49.2% 0.137 264.2)
-
Step 800
800
#2F4B8D
oklch(42.7% 0.114 264.7)
-
Step 900
900 (this color)
#1F3464
oklch(33.5% 0.089 264.4)
-
Step 950
950
#182542
oklch(26.9% 0.057 264.6)
#1F3464 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #1D3966 | 0.015 |
| Deuteranopia (no green cones) | #113363 | 0.015 |
| Tritanopia (no blue cones) | #003F47 | 0.073 |
| Achromatopsia (no color) | #363636 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F3464
#1F3464
oklch(33.5% 0.089 264.4)
- #473300
#473300
oklch(33.5% 0.069 84.4)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #1F3464, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.024
- Prussian Blue #1D3557 ΔE 0.024
- Marine #042E60 ΔE 0.033
- Dark Blue Grey #1F3B4D ΔE 0.051
- Twilight Blue #0A437A ΔE 0.054
- Midnight Green #073B4C ΔE 0.057
- Space Cadet #2B2D42 ΔE 0.061
- Gunmetal #293241 ΔE 0.062
Use #1F3464 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.