#233073
Closest named color: Marine Blue (#01386A). oklch(34.1% 0.116 270.7), rgb(35, 48, 115).
Aa
White text reads best on this color (12.05:1).
About this color
#233073 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.116 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.038 away. White text reads best on it, at 12.05:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.74:1 |
| White text | 12.05:1 |
Values
| HEX | #233073 |
| RGB | rgb(35, 48, 115) |
| HSL | hsl(230, 53%, 29%) |
| OKLCH | oklch(34.1% 0.116 270.7) |
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 #233073 | 12.05:1 | AAA | Lc -100.8 | Preferred for body text |
| Black text on #233073 | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #233073 text on white | 12.05:1 | AAA | Lc 97.2 | Preferred for body text |
| #233073 text on black | 1.74:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FB
oklch(93.5% 0.025 271.1)
-
Step 200
200
#CDD8FA
oklch(88.5% 0.048 271.2)
-
Step 300
300
#ABBEFA
oklch(80.9% 0.088 270.8)
-
Step 400
400
#809AF7
oklch(70.6% 0.139 270.7)
-
Step 500
500
#637EF4
oklch(63.2% 0.178 270.8)
-
Step 600
600
#4C64E2
oklch(55.6% 0.193 270.7)
-
Step 700
700
#3E52C5
oklch(49.2% 0.18 270.8)
-
Step 800
800
#32449F
oklch(42.7% 0.149 270.4)
-
Step 900
900 (this color)
#233073
oklch(34.1% 0.116 270.7)
-
Step 950
950
#19234A
oklch(27.1% 0.073 270.1)
#233073 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) | #003A75 | 0.035 |
| Deuteranopia (no green cones) | #003372 | 0.029 |
| Tritanopia (no blue cones) | #00404C | 0.096 |
| Achromatopsia (no color) | #363636 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #233073
#233073
oklch(34.1% 0.116 270.7)
- #463600
#463600
oklch(34.1% 0.07 90.3)
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 #233073, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.038
- Marine #042E60 ΔE 0.046
- Twilight Blue #0A437A ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.054
- Midnight Blue #191970 ΔE 0.060
- Cobalt #1E488F ΔE 0.077
- Royal #0C1793 ΔE 0.079
- Dark Blue Grey #1F3B4D ΔE 0.081
Use #233073 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.