#1F4392
Closest named color: Cobalt (#1E488F). oklch(40.6% 0.137 263.2), rgb(31, 67, 146).
Aa
White text reads best on this color (9.22:1).
About this color
#1F4392 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.137 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.015 away. White text reads best on it, at 9.22:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.27:1 |
| White text | 9.22:1 |
Values
| HEX | #1F4392 |
| RGB | rgb(31, 67, 146) |
| HSL | hsl(221, 65%, 35%) |
| OKLCH | oklch(40.6% 0.137 263.2) |
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 #1F4392 | 9.22:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #1F4392 | 2.27:1 | Fails | Lc 13.1 | Not readable |
| #1F4392 text on white | 9.22:1 | AAA | Lc 90.8 | Preferred for body text |
| #1F4392 text on black | 2.27:1 | Fails | Lc -11.5 | 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 800.
-
Step 50
50
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CADAF7
oklch(88.5% 0.044 262.4)
-
Step 300
300
#A6C1F5
oklch(80.9% 0.08 263.3)
-
Step 400
400
#769FF0
oklch(70.7% 0.128 263.1)
-
Step 500
500
#5385EB
oklch(63.2% 0.163 262.9)
-
Step 600
600
#396BDA
oklch(55.5% 0.179 263.4)
-
Step 700
700
#2B59BD
oklch(49.1% 0.166 263.1)
-
Step 800
800 (this color)
#1F4392
oklch(40.6% 0.137 263.2)
-
Step 900
900
#223E7A
oklch(37.7% 0.108 263.3)
-
Step 950
950
#142547
oklch(27% 0.067 262.7)
#1F4392 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) | #084D95 | 0.028 |
| Deuteranopia (no green cones) | #004290 | 0.019 |
| Tritanopia (no blue cones) | #005664 | 0.106 |
| Achromatopsia (no color) | #474747 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F4392
#1F4392
oklch(40.6% 0.137 263.2)
- #5F4400
#5F4400
oklch(40.6% 0.083 82.8)
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 #1F4392, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.015
- Twilight Blue #0A437A ΔE 0.044
- Light Navy #155084 ΔE 0.046
- Dusk Blue #26538D ΔE 0.049
- Sapphire #2138AB ΔE 0.049
- Blueberry #464196 ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.054
- Deep Sea Blue #015482 ΔE 0.059
Use #1F4392 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.