#223663
Closest named color: Prussian Blue (#1D3557). oklch(34.1% 0.083 264.4), rgb(34, 54, 99).
Aa
White text reads best on this color (11.82:1).
About this color
#223663 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.083 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.023 away. White text reads best on it, at 11.82:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.77:1 |
| White text | 11.82:1 |
Values
| HEX | #223663 |
| RGB | rgb(34, 54, 99) |
| HSL | hsl(222, 49%, 26%) |
| OKLCH | oklch(34.1% 0.083 264.4) |
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 #223663 | 11.82:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #223663 | 1.77:1 | Fails | Lc 0.0 | Not readable |
| #223663 text on white | 11.82:1 | AAA | Lc 96.9 | Preferred for body text |
| #223663 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CED9F1
oklch(88.4% 0.035 266)
-
Step 300
300
#ADC1EA
oklch(81% 0.062 264.6)
-
Step 400
400
#81A0DF
oklch(70.7% 0.099 263.9)
-
Step 500
500
#6287D6
oklch(63.1% 0.127 264.1)
-
Step 600
600
#496FC4
oklch(55.6% 0.139 264.2)
-
Step 700
700
#3B5CA9
oklch(49% 0.129 264.6)
-
Step 800
800
#314C89
oklch(42.8% 0.106 264.4)
-
Step 900
900 (this color)
#223663
oklch(34.1% 0.083 264.4)
-
Step 950
950
#192640
oklch(27.1% 0.052 263.2)
#223663 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) | #223B65 | 0.015 |
| Deuteranopia (no green cones) | #183562 | 0.012 |
| Tritanopia (no blue cones) | #004047 | 0.071 |
| Achromatopsia (no color) | #373737 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #223663
#223663
oklch(34.1% 0.083 264.4)
- #493500
#493500
oklch(34.2% 0.07 85.2)
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 #223663, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.023
- Marine Blue #01386A ΔE 0.027
- Marine #042E60 ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.046
- Twilight Blue #0A437A ΔE 0.051
- Midnight Green #073B4C ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.058
- Gunmetal #293241 ΔE 0.059
Use #223663 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.