#031330
Closest named color: Rich Black (#0D1B2A). oklch(19.3% 0.063 259.5), rgb(3, 19, 48).
Aa
White text reads best on this color (18.42:1).
About this color
#031330 is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.063 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.037 away. White text reads best on it, at 18.42:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.13:1 |
| White text | 18.42:1 |
Values
| HEX | #031330 |
| RGB | rgb(3, 19, 48) |
| HSL | hsl(219, 88%, 10%) |
| OKLCH | oklch(19.3% 0.063 259.5) |
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 #031330 | 18.42:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #031330 | 1.13:1 | Fails | Lc 0.0 | Not readable |
| #031330 text on white | 18.42:1 | AAA | Lc 104.9 | Preferred for body text |
| #031330 text on black | 1.13:1 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF9
oklch(93.7% 0.021 259.2)
-
Step 200
200
#C9DAF5
oklch(88.4% 0.042 259.6)
-
Step 300
300
#A4C2F1
oklch(80.8% 0.074 259.3)
-
Step 400
400
#73A1EA
oklch(70.6% 0.119 259.3)
-
Step 500
500
#4E88E4
oklch(63.1% 0.152 259.3)
-
Step 600
600
#316FD2
oklch(55.5% 0.166 259.5)
-
Step 700
700
#245DB6
oklch(49.2% 0.153 259.3)
-
Step 800
800
#1F4C93
oklch(42.7% 0.127 259.3)
-
Step 900
900
#1F4075
oklch(37.7% 0.099 259.5)
-
Step 950
950 (this color)
#031330
oklch(19.3% 0.063 259.5)
#031330 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) | #031631 | 0.010 |
| Deuteranopia (no green cones) | #00122F | 0.007 |
| Tritanopia (no blue cones) | #001A1F | 0.048 |
| Achromatopsia (no color) | #141414 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031330
#031330
oklch(19.3% 0.063 259.5)
- #1E1200
#1E1200
oklch(19.3% 0.04 79.3)
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 #031330, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.037
- Navy Blue #001146 ΔE 0.043
- Dark Navy #000435 ΔE 0.047
- Rich Navy #001219 ΔE 0.048
- Dark Navy Blue #00022E ΔE 0.057
- Very Dark Blue #000133 ΔE 0.058
- Night Blue #040348 ΔE 0.058
- Midnight #03012D ΔE 0.059
Use #031330 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.