#23347B
Closest named color: Marine Blue (#01386A). oklch(35.6% 0.122 269.1), rgb(35, 52, 123).
Aa
White text reads best on this color (11.35:1).
About this color
#23347B is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.122 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.042 away. White text reads best on it, at 11.35:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.84:1 |
| White text | 11.35:1 |
Values
| HEX | #23347B |
| RGB | rgb(35, 52, 123) |
| HSL | hsl(228, 56%, 31%) |
| OKLCH | oklch(35.6% 0.122 269.1) |
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 #23347B | 11.35:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #23347B | 1.84:1 | Fails | Lc 8.1 | Not readable |
| #23347B text on white | 11.35:1 | AAA | Lc 95.8 | Preferred for body text |
| #23347B text on black | 1.84:1 | 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
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CBD8FC
oklch(88.4% 0.052 269.6)
-
Step 300
300
#A8BFFD
oklch(81% 0.092 268.6)
-
Step 400
400
#7B9AFC
oklch(70.6% 0.148 269.1)
-
Step 500
500
#5C7EF9
oklch(63.1% 0.187 268.9)
-
Step 600
600
#4563E8
oklch(55.6% 0.203 269.1)
-
Step 700
700
#3851CA
oklch(49.1% 0.189 269.2)
-
Step 800
800
#2E43A3
oklch(42.7% 0.157 269.2)
-
Step 900
900 (this color)
#23347B
oklch(35.6% 0.122 269.1)
-
Step 950
950
#17234C
oklch(27.1% 0.077 268.6)
#23347B 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) | #003E7D | 0.033 |
| Deuteranopia (no green cones) | #00367A | 0.027 |
| Tritanopia (no blue cones) | #004552 | 0.099 |
| Achromatopsia (no color) | #3A3A3A | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23347B
#23347B
oklch(35.6% 0.122 269.1)
- #4B3900
#4B3900
oklch(35.4% 0.072 88.8)
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 #23347B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.042
- Twilight Blue #0A437A ΔE 0.043
- Marine #042E60 ΔE 0.060
- Cobalt #1E488F ΔE 0.061
- Prussian Blue #1D3557 ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.069
- Midnight Blue #191970 ΔE 0.072
- Royal #0C1793 ΔE 0.078
Use #23347B 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.