#222F7D
Closest named color: Marine Blue (#01386A). oklch(34.7% 0.132 270.6), rgb(34, 47, 125).
Aa
White text reads best on this color (11.85:1).
About this color
#222F7D is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.132 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.049 away. White text reads best on it, at 11.85:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.77:1 |
| White text | 11.85:1 |
Values
| HEX | #222F7D |
| RGB | rgb(34, 47, 125) |
| HSL | hsl(231, 57%, 31%) |
| OKLCH | oklch(34.7% 0.132 270.6) |
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 #222F7D | 11.85:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #222F7D | 1.77:1 | Fails | Lc 0.0 | Not readable |
| #222F7D text on white | 11.85:1 | AAA | Lc 96.7 | Preferred for body text |
| #222F7D text on black | 1.77:1 | 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
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#A9BEFF
oklch(80.9% 0.095 270.4)
-
Step 400
400
#7D99FF
oklch(70.7% 0.152 270.5)
-
Step 500
500
#5F7BFF
oklch(63.1% 0.198 270.7)
-
Step 600
600
#475EF1
oklch(55.5% 0.22 270.5)
-
Step 700
700
#3A4CD2
oklch(49% 0.205 270.7)
-
Step 800
800
#2F40AA
oklch(42.7% 0.17 270.4)
-
Step 900
900 (this color)
#222F7D
oklch(34.7% 0.132 270.6)
-
Step 950
950
#18224F
oklch(27.2% 0.083 270.5)
#222F7D 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) | #003C80 | 0.038 |
| Deuteranopia (no green cones) | #00337B | 0.027 |
| Tritanopia (no blue cones) | #004351 | 0.107 |
| Achromatopsia (no color) | #373737 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #222F7D
#222F7D
oklch(34.7% 0.132 270.6)
- #483800
#483800
oklch(34.8% 0.071 90.8)
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 #222F7D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.049
- Twilight Blue #0A437A ΔE 0.056
- Marine #042E60 ΔE 0.059
- Midnight Blue #191970 ΔE 0.060
- Royal #0C1793 ΔE 0.066
- Prussian Blue #1D3557 ΔE 0.071
- Cobalt #1E488F ΔE 0.071
- Dark Slate Blue #483D8B ΔE 0.076
Use #222F7D 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.