#223181
Closest named color: Marine Blue (#01386A). oklch(35.4% 0.135 269.9), rgb(34, 49, 129).
Aa
White text reads best on this color (11.51:1).
About this color
#223181 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.135 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.052 away. White text reads best on it, at 11.51:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.82:1 |
| White text | 11.51:1 |
Values
| HEX | #223181 |
| RGB | rgb(34, 49, 129) |
| HSL | hsl(231, 58%, 32%) |
| OKLCH | oklch(35.4% 0.135 269.9) |
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 #223181 | 11.51:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #223181 | 1.82:1 | Fails | Lc 7.9 | Not readable |
| #223181 text on white | 11.51:1 | AAA | Lc 96.0 | Preferred for body text |
| #223181 text on black | 1.82:1 | 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 900.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FE
oklch(93.5% 0.029 271.1)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7C99FF
oklch(70.6% 0.153 270.2)
-
Step 500
500
#5D7CFF
oklch(63.2% 0.197 269.9)
-
Step 600
600
#445EF4
oklch(55.6% 0.225 269.8)
-
Step 700
700
#374CD5
oklch(49.2% 0.21 269.8)
-
Step 800
800
#2D3FAC
oklch(42.6% 0.174 269.9)
-
Step 900
900 (this color)
#223181
oklch(35.4% 0.135 269.9)
-
Step 950
950
#172150
oklch(26.9% 0.087 270.5)
#223181 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) | #003E84 | 0.037 |
| Deuteranopia (no green cones) | #00357F | 0.026 |
| Tritanopia (no blue cones) | #004554 | 0.108 |
| Achromatopsia (no color) | #393939 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #223181
#223181
oklch(35.4% 0.135 269.9)
- #4A3900
#4A3900
oklch(35.3% 0.072 89.9)
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 #223181, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.052
- Twilight Blue #0A437A ΔE 0.052
- Cobalt #1E488F ΔE 0.064
- Royal #0C1793 ΔE 0.066
- Marine #042E60 ΔE 0.066
- Midnight Blue #191970 ΔE 0.067
- Dark Slate Blue #483D8B ΔE 0.071
- Sapphire #2138AB ΔE 0.072
Use #223181 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.