#03182E
Closest named color: Rich Black (#0D1B2A). oklch(20.6% 0.052 251), rgb(3, 24, 46).
Aa
White text reads best on this color (17.88:1).
About this color
#03182E is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.052 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.020 away. White text reads best on it, at 17.88:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.17:1 |
| White text | 17.88:1 |
Values
| HEX | #03182E |
| RGB | rgb(3, 24, 46) |
| HSL | hsl(211, 88%, 10%) |
| OKLCH | oklch(20.6% 0.052 251) |
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 #03182E | 17.88:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #03182E | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #03182E text on white | 17.88:1 | AAA | Lc 104.5 | Preferred for body text |
| #03182E text on black | 1.17:1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C9DBF0
oklch(88.4% 0.035 252.3)
-
Step 300
300
#A4C4E8
oklch(80.9% 0.062 251.6)
-
Step 400
400
#71A5DC
oklch(70.7% 0.098 250.7)
-
Step 500
500
#498DD3
oklch(63.1% 0.127 251.1)
-
Step 600
600
#2876C0
oklch(55.6% 0.137 250.9)
-
Step 700
700
#1A63A6
oklch(49.2% 0.127 250.9)
-
Step 800
800
#195186
oklch(42.7% 0.105 250.8)
-
Step 900
900
#1B436B
oklch(37.6% 0.082 250.9)
-
Step 950
950 (this color)
#03182E
oklch(20.6% 0.052 251)
#03182E 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) | #0D192F | 0.014 |
| Deuteranopia (no green cones) | #06152E | 0.011 |
| Tritanopia (no blue cones) | #001D20 | 0.038 |
| Achromatopsia (no color) | #171717 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03182E
#03182E
oklch(20.6% 0.052 251)
- #241300
#241300
oklch(20.6% 0.045 69.9)
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 #03182E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.020
- Rich Navy #001219 ΔE 0.047
- Navy Blue #001146 ΔE 0.052
- Dark #1B2431 ΔE 0.058
- Oxford Blue #1B263B ΔE 0.065
- Dark Navy #000435 ΔE 0.065
- Jet #212529 ΔE 0.071
- Almost Black #070D0D ΔE 0.071
Use #03182E 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.