#031D3E
Closest named color: Rich Black (#0D1B2A). oklch(23.3% 0.071 255.6), rgb(3, 29, 62).
Aa
White text reads best on this color (16.81:1).
About this color
#031D3E is a very dark, moderately saturated blue. In OKLCH its lightness is 23%, its chroma 0.071 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.039 away. White text reads best on it, at 16.81:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.24:1 |
| White text | 16.81:1 |
Values
| HEX | #031D3E |
| RGB | rgb(3, 29, 62) |
| HSL | hsl(214, 91%, 13%) |
| OKLCH | oklch(23.3% 0.071 255.6) |
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 #031D3E | 16.81:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #031D3E | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #031D3E text on white | 16.81:1 | AAA | Lc 103.5 | Preferred for body text |
| #031D3E text on black | 1.24:1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#DFEBFA
oklch(93.6% 0.024 254)
-
Step 200
200
#C5DBF8
oklch(88.4% 0.047 255.4)
-
Step 300
300
#9DC3F7
oklch(80.8% 0.085 256.3)
-
Step 400
400
#65A3F3
oklch(70.8% 0.134 255.4)
-
Step 500
500
#3689EE
oklch(63.1% 0.171 255.4)
-
Step 600
600
#0170DD
oklch(55.6% 0.187 255.6)
-
Step 700
700
#005EBB
oklch(49.1% 0.165 255.5)
-
Step 800
800
#004C9B
oklch(42.6% 0.144 255.8)
-
Step 900
900
#0F417B
oklch(37.8% 0.111 255.3)
-
Step 950
950 (this color)
#031D3E
oklch(23.3% 0.071 255.6)
#031D3E 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) | #0B203F | 0.014 |
| Deuteranopia (no green cones) | #001B3D | 0.008 |
| Tritanopia (no blue cones) | #00252A | 0.053 |
| Achromatopsia (no color) | #1D1D1D | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031D3E
#031D3E
oklch(23.3% 0.071 255.6)
- #2B1A00
#2B1A00
oklch(23.4% 0.049 75.8)
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 #031D3E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.039
- Navy Blue #001146 ΔE 0.040
- Oxford Blue #1B263B ΔE 0.046
- Dark #1B2431 ΔE 0.050
- Night Blue #040348 ΔE 0.068
- Jet #212529 ΔE 0.068
- Dark Indigo #1F0954 ΔE 0.071
- Dark Navy #000435 ΔE 0.078
Use #031D3E 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.