#031D3F
Closest named color: Navy Blue (#001146). oklch(23.4% 0.073 256.1), rgb(3, 29, 63).
Aa
White text reads best on this color (16.78:1).
About this color
#031D3F is a very dark, moderately saturated blue. In OKLCH its lightness is 23%, its chroma 0.073 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.039 away. White text reads best on it, at 16.78:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.25:1 |
| White text | 16.78:1 |
Values
| HEX | #031D3F |
| RGB | rgb(3, 29, 63) |
| HSL | hsl(214, 91%, 13%) |
| OKLCH | oklch(23.4% 0.073 256.1) |
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 #031D3F | 16.78:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #031D3F | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #031D3F text on white | 16.78:1 | AAA | Lc 103.4 | Preferred for body text |
| #031D3F 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C5DBF9
oklch(88.5% 0.048 256.2)
-
Step 300
300
#9CC3F8
oklch(80.8% 0.086 256.2)
-
Step 400
400
#64A2F5
oklch(70.6% 0.138 256.2)
-
Step 500
500
#3688F1
oklch(63.1% 0.176 256.3)
-
Step 600
600
#006FDF
oklch(55.6% 0.191 256.1)
-
Step 700
700
#005DBD
oklch(49.1% 0.169 256.1)
-
Step 800
800
#004C9C
oklch(42.7% 0.146 256)
-
Step 900
900
#0E407D
oklch(37.7% 0.116 256.3)
-
Step 950
950 (this color)
#031D3F
oklch(23.4% 0.073 256.1)
#031D3F 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) | #0A2040 | 0.014 |
| Deuteranopia (no green cones) | #001B3E | 0.008 |
| Tritanopia (no blue cones) | #00252A | 0.055 |
| Achromatopsia (no color) | #1D1D1D | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031D3F
#031D3F
oklch(23.4% 0.073 256.1)
- #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 #031D3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.039
- Rich Black #0D1B2A ΔE 0.041
- Oxford Blue #1B263B ΔE 0.047
- Dark #1B2431 ΔE 0.051
- Night Blue #040348 ΔE 0.067
- Jet #212529 ΔE 0.069
- Dark Indigo #1F0954 ΔE 0.069
- Marine #042E60 ΔE 0.078
Use #031D3F 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.