#031B48
Closest named color: Navy Blue (#001146). oklch(23.7% 0.09 260.7), rgb(3, 27, 72).
Aa
White text reads best on this color (16.74:1).
About this color
#031B48 is a very dark, moderately saturated blue. In OKLCH its lightness is 24%, its chroma 0.090 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.030 away. White text reads best on it, at 16.74:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.25:1 |
| White text | 16.74:1 |
Values
| HEX | #031B48 |
| RGB | rgb(3, 27, 72) |
| HSL | hsl(219, 92%, 15%) |
| OKLCH | oklch(23.7% 0.09 260.7) |
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 #031B48 | 16.74:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #031B48 | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #031B48 text on white | 16.74:1 | AAA | Lc 103.3 | Preferred for body text |
| #031B48 text on black | 1.25:1 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DEEBFF
oklch(93.6% 0.031 258.9)
-
Step 200
200
#C4DAFF
oklch(88.4% 0.057 260.8)
-
Step 300
300
#9DC2FF
oklch(81% 0.096 260.2)
-
Step 400
400
#679FFF
oklch(70.7% 0.153 260.6)
-
Step 500
500
#3C83FF
oklch(63.2% 0.198 260.7)
-
Step 600
600
#0064FA
oklch(55.5% 0.237 260.8)
-
Step 700
700
#0054D4
oklch(49.1% 0.209 260.7)
-
Step 800
800
#0044B0
oklch(42.7% 0.182 260.8)
-
Step 900
900
#0D3B8B
oklch(37.7% 0.142 260.9)
-
Step 950
950 (this color)
#031B48
oklch(23.7% 0.09 260.7)
#031B48 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) | #00214A | 0.018 |
| Deuteranopia (no green cones) | #001B47 | 0.004 |
| Tritanopia (no blue cones) | #00262E | 0.068 |
| Achromatopsia (no color) | #1E1E1E | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031B48
#031B48
oklch(23.7% 0.09 260.7)
- #2A1C00
#2A1C00
oklch(23.8% 0.049 82.5)
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 #031B48, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.030
- Dark Indigo #1F0954 ΔE 0.056
- Night Blue #040348 ΔE 0.057
- Oxford Blue #1B263B ΔE 0.057
- Rich Black #0D1B2A ΔE 0.058
- Darkblue #030764 ΔE 0.062
- Dark #1B2431 ΔE 0.065
- Marine #042E60 ΔE 0.071
Use #031B48 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.