#031D38
Closest named color: Rich Black (#0D1B2A). oklch(22.8% 0.061 251.8), rgb(3, 29, 56).
Aa
White text reads best on this color (16.98:1).
About this color
#031D38 is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.061 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.028 away. White text reads best on it, at 16.98:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 16.98:1 |
Values
| HEX | #031D38 |
| RGB | rgb(3, 29, 56) |
| HSL | hsl(211, 90%, 12%) |
| OKLCH | oklch(22.8% 0.061 251.8) |
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 #031D38 | 16.98:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #031D38 | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #031D38 text on white | 16.98:1 | AAA | Lc 103.7 | Preferred for body text |
| #031D38 text on black | 1.23:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C6DCF4
oklch(88.6% 0.041 250.6)
-
Step 300
300
#9FC4EF
oklch(80.9% 0.073 252.5)
-
Step 400
400
#68A5E7
oklch(70.8% 0.116 251.5)
-
Step 500
500
#3B8CE0
oklch(63.1% 0.149 252.1)
-
Step 600
600
#0A74CE
oklch(55.5% 0.163 252)
-
Step 700
700
#0061B0
oklch(49% 0.147 252)
-
Step 800
800
#045090
oklch(42.8% 0.124 251.6)
-
Step 900
900
#124373
oklch(37.8% 0.097 251.8)
-
Step 950
950 (this color)
#031D38
oklch(22.8% 0.061 251.8)
#031D38 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) | #0F1F39 | 0.016 |
| Deuteranopia (no green cones) | #061A37 | 0.010 |
| Tritanopia (no blue cones) | #002327 | 0.045 |
| Achromatopsia (no color) | #1C1C1C | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031D38
#031D38
oklch(22.8% 0.061 251.8)
- #2A1800
#2A1800
oklch(22.8% 0.049 72.5)
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 #031D38, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.028
- Dark #1B2431 ΔE 0.045
- Oxford Blue #1B263B ΔE 0.046
- Navy Blue #001146 ΔE 0.047
- Jet #212529 ΔE 0.062
- Rich Navy #001219 ΔE 0.070
- Night Blue #040348 ΔE 0.073
- Dark Navy #000435 ΔE 0.078
Use #031D38 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.