#0D2181
Closest named color: Royal (#0C1793). oklch(31.5% 0.16 266.3), rgb(13, 33, 129).
Aa
White text reads best on this color (13.53:1).
About this color
#0D2181 is a dark, vivid blue. In OKLCH its lightness is 32%, its chroma 0.160 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Royal (#0C1793), ΔE 0.033 away. White text reads best on it, at 13.53:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Royal (#0C1793) |
| Black text | 1.55:1 |
| White text | 13.53:1 |
Values
| HEX | #0D2181 |
| RGB | rgb(13, 33, 129) |
| HSL | hsl(230, 82%, 28%) |
| OKLCH | oklch(31.5% 0.16 266.3) |
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 #0D2181 | 13.53:1 | AAA | Lc -102.4 | Preferred for body text |
| Black text on #0D2181 | 1.55:1 | Fails | Lc 0.0 | Not readable |
| #0D2181 text on white | 13.53:1 | AAA | Lc 99.1 | Preferred for body text |
| #0D2181 text on black | 1.55:1 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A4BFFF
oklch(80.8% 0.096 266.6)
-
Step 400
400
#749CFF
oklch(70.8% 0.152 266)
-
Step 500
500
#517FFF
oklch(63.2% 0.197 266)
-
Step 600
600
#315DFF
oklch(55.6% 0.244 266.2)
-
Step 700
700
#1D34FF
oklch(49.1% 0.287 266.3)
-
Step 800
800
#1700E9
oklch(42.7% 0.289 266.3)
-
Step 900
900
#1104C4
oklch(37.6% 0.253 266.2)
-
Step 950
950 (this color)
#0D2181
oklch(31.5% 0.16 266.3)
#0D2181 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) | #003484 | 0.044 |
| Deuteranopia (no green cones) | #00297F | 0.017 |
| Tritanopia (no blue cones) | #003D4F | 0.122 |
| Achromatopsia (no color) | #2E2E2E | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0D2181
#0D2181
oklch(31.5% 0.16 266.3)
- #402F00
#402F00
oklch(31.6% 0.065 86.7)
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 #0D2181, closest first.
No curated palette has a color within ΔE 0.04 of #0D2181.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal #0C1793 ΔE 0.033
- Midnight Blue #191970 ΔE 0.036
- Dark Blue #00008B ΔE 0.048
- Navy #000080 ΔE 0.052
- Deep Blue #040273 ΔE 0.061
- Dark Royal Blue #02066F ΔE 0.063
- Marine #042E60 ΔE 0.066
- Cobalt Blue #030AA7 ΔE 0.067
Use #0D2181 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.