#09317D
Closest named color: Marine Blue (#01386A). oklch(34.1% 0.136 261.7), rgb(9, 49, 125).
Aa
White text reads best on this color (12.02:1).
About this color
#09317D is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.136 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.040 away. White text reads best on it, at 12.02:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.74:1 |
| White text | 12.02:1 |
Values
| HEX | #09317D |
| RGB | rgb(9, 49, 125) |
| HSL | hsl(219, 87%, 26%) |
| OKLCH | oklch(34.1% 0.136 261.7) |
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 #09317D | 12.02:1 | AAA | Lc -100.5 | Preferred for body text |
| Black text on #09317D | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #09317D text on white | 12.02:1 | AAA | Lc 96.8 | Preferred for body text |
| #09317D 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEAFE
oklch(93.5% 0.03 262.5)
-
Step 200
200
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9FC1FF
oklch(80.9% 0.096 262.2)
-
Step 400
400
#6A9EFF
oklch(70.6% 0.153 261.9)
-
Step 500
500
#4082FF
oklch(63.1% 0.198 261.6)
-
Step 600
600
#1965F5
oklch(55.6% 0.227 261.8)
-
Step 700
700
#0B53D5
oklch(49.1% 0.21 261.7)
-
Step 800
800
#0E45AC
oklch(42.7% 0.174 261.7)
-
Step 900
900 (this color)
#09317D
oklch(34.1% 0.136 261.7)
-
Step 950
950
#0D2450
oklch(27.1% 0.086 261.8)
#09317D 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) | #003C80 | 0.030 |
| Deuteranopia (no green cones) | #00317C | 0.005 |
| Tritanopia (no blue cones) | #004452 | 0.102 |
| Achromatopsia (no color) | #363636 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #09317D
#09317D
oklch(34.1% 0.136 261.7)
- #4A3400
#4A3400
oklch(34.1% 0.07 82.4)
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 #09317D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.040
- Marine #042E60 ΔE 0.052
- Twilight Blue #0A437A ΔE 0.052
- Midnight Blue #191970 ΔE 0.060
- Royal #0C1793 ΔE 0.060
- Prussian Blue #1D3557 ΔE 0.070
- Cobalt #1E488F ΔE 0.074
- Dark Blue #00008B ΔE 0.083
Use #09317D 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.