#233166
Closest named color: Marine Blue (#01386A). oklch(33.2% 0.095 269.5), rgb(35, 49, 102).
Aa
White text reads best on this color (12.33:1).
About this color
#233166 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.095 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.031 away. White text reads best on it, at 12.33:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.70:1 |
| White text | 12.33:1 |
Values
| HEX | #233166 |
| RGB | rgb(35, 49, 102) |
| HSL | hsl(227, 49%, 27%) |
| OKLCH | oklch(33.2% 0.095 269.5) |
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 #233166 | 12.33:1 | AAA | Lc -101.4 | Preferred for body text |
| Black text on #233166 | 1.70:1 | Fails | Lc 0.0 | Not readable |
| #233166 text on white | 12.33:1 | AAA | Lc 97.9 | Preferred for body text |
| #233166 text on black | 1.70:1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CFD9F4
oklch(88.6% 0.039 269.4)
-
Step 300
300
#AEBFEF
oklch(80.8% 0.071 269.6)
-
Step 400
400
#849DE8
oklch(70.7% 0.114 269.3)
-
Step 500
500
#6783E1
oklch(63.2% 0.145 269.4)
-
Step 600
600
#4F6ACE
oklch(55.5% 0.157 269.4)
-
Step 700
700
#4158B3
oklch(49.2% 0.147 269.7)
-
Step 800
800
#354891
oklch(42.7% 0.122 269.6)
-
Step 900
900 (this color)
#233166
oklch(33.2% 0.095 269.5)
-
Step 950
950
#1B2444
oklch(27% 0.061 270.1)
#233166 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) | #153868 | 0.023 |
| Deuteranopia (no green cones) | #083265 | 0.025 |
| Tritanopia (no blue cones) | #003D46 | 0.081 |
| Achromatopsia (no color) | #353535 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #233166
#233166
oklch(33.2% 0.095 269.5)
- #443400
#443400
oklch(33.3% 0.068 89.7)
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 #233166, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.031
- Prussian Blue #1D3557 ΔE 0.032
- Marine #042E60 ΔE 0.034
- Twilight Blue #0A437A ΔE 0.059
- Dark Blue Grey #1F3B4D ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.064
- Midnight Green #073B4C ΔE 0.066
- Midnight Blue #191970 ΔE 0.066
Use #233166 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.