#031C64
Closest named color: Midnight Blue (#191970). oklch(27% 0.13 263.7), rgb(3, 28, 100).
Aa
White text reads best on this color (15.50:1).
About this color
#031C64 is a dark, moderately saturated blue. In OKLCH its lightness is 27%, its chroma 0.130 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Blue (#191970), ΔE 0.032 away. White text reads best on it, at 15.50:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Midnight Blue (#191970) |
| Black text | 1.35:1 |
| White text | 15.50:1 |
Values
| HEX | #031C64 |
| RGB | rgb(3, 28, 100) |
| HSL | hsl(225, 94%, 20%) |
| OKLCH | oklch(27% 0.13 263.7) |
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 #031C64 | 15.50:1 | AAA | Lc -104.6 | Preferred for body text |
| Black text on #031C64 | 1.35:1 | Fails | Lc 0.0 | Not readable |
| #031C64 text on white | 15.50:1 | AAA | Lc 101.8 | Preferred for body text |
| #031C64 text on black | 1.35:1 | 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 950.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300
#A1C0FF
oklch(80.8% 0.096 264.1)
-
Step 400
400
#6F9DFF
oklch(70.7% 0.152 263.9)
-
Step 500
500
#4880FF
oklch(63% 0.198 263.8)
-
Step 600
600
#2160FF
oklch(55.7% 0.244 263.7)
-
Step 700
700
#0040F5
oklch(49% 0.269 263.7)
-
Step 800
800
#0034CC
oklch(42.8% 0.234 263.7)
-
Step 900
900
#012BAB
oklch(37.7% 0.204 263.8)
-
Step 950
950 (this color)
#031C64
oklch(27% 0.13 263.7)
#031C64 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) | #002966 | 0.034 |
| Deuteranopia (no green cones) | #002063 | 0.010 |
| Tritanopia (no blue cones) | #00303D | 0.099 |
| Achromatopsia (no color) | #242424 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031C64
#031C64
oklch(27% 0.13 263.7)
- #332300
#332300
oklch(26.8% 0.055 83)
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 #031C64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Blue #191970 ΔE 0.032
- Darkblue #030764 ΔE 0.039
- Dark Royal Blue #02066F ΔE 0.039
- Deep Blue #040273 ΔE 0.044
- Marine #042E60 ΔE 0.050
- Navy #000080 ΔE 0.058
- Dark Indigo #1F0954 ΔE 0.058
- Navy Blue #001146 ΔE 0.065
Use #031C64 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.