#232C78
Closest named color: Marine Blue (#01386A). oklch(33.7% 0.129 272.3), rgb(35, 44, 120).
Aa
White text reads best on this color (12.33:1).
About this color
#232C78 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.129 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.048 away. White text reads best on it, at 12.33:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.70:1 |
| White text | 12.33:1 |
Values
| HEX | #232C78 |
| RGB | rgb(35, 44, 120) |
| HSL | hsl(234, 55%, 30%) |
| OKLCH | oklch(33.7% 0.129 272.3) |
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 #232C78 | 12.33:1 | AAA | Lc -101.2 | Preferred for body text |
| Black text on #232C78 | 1.70:1 | Fails | Lc 0.0 | Not readable |
| #232C78 text on white | 12.33:1 | AAA | Lc 97.6 | Preferred for body text |
| #232C78 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FD
oklch(93.5% 0.028 272.5)
-
Step 200
200
#CDD8FE
oklch(88.6% 0.054 272.5)
-
Step 300
300
#ABBDFF
oklch(80.9% 0.096 272.3)
-
Step 400
400
#8198FF
oklch(70.7% 0.153 272.5)
-
Step 500
500
#637AFF
oklch(63.2% 0.198 272.1)
-
Step 600
600
#4D5EEE
oklch(55.6% 0.215 272.2)
-
Step 700
700
#3F4CCF
oklch(49% 0.2 272.2)
-
Step 800
800
#3440A7
oklch(42.8% 0.164 272.3)
-
Step 900
900 (this color)
#232C78
oklch(33.7% 0.129 272.3)
-
Step 950
950
#1A214E
oklch(27% 0.083 273)
#232C78 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) | #00397A | 0.039 |
| Deuteranopia (no green cones) | #003177 | 0.030 |
| Tritanopia (no blue cones) | #003F4D | 0.105 |
| Achromatopsia (no color) | #353535 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #232C78
#232C78
oklch(33.7% 0.129 272.3)
- #443500
#443500
oklch(33.6% 0.069 91.2)
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 #232C78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.048
- Midnight Blue #191970 ΔE 0.051
- Marine #042E60 ΔE 0.053
- Twilight Blue #0A437A ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.066
- Royal #0C1793 ΔE 0.067
- Cobalt #1E488F ΔE 0.082
- Dark Slate Blue #483D8B ΔE 0.083
Use #232C78 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.