#10306A
Closest named color: Marine (#042E60). oklch(32.4% 0.108 261.1), rgb(16, 48, 106).
Aa
White text reads best on this color (12.70:1).
About this color
#10306A is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.108 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.021 away. White text reads best on it, at 12.70:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.65:1 |
| White text | 12.70:1 |
Values
| HEX | #10306A |
| RGB | rgb(16, 48, 106) |
| HSL | hsl(219, 74%, 24%) |
| OKLCH | oklch(32.4% 0.108 261.1) |
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 #10306A | 12.70:1 | AAA | Lc -101.7 | Preferred for body text |
| Black text on #10306A | 1.65:1 | Fails | Lc 0.0 | Not readable |
| #10306A text on white | 12.70:1 | AAA | Lc 98.3 | Preferred for body text |
| #10306A text on black | 1.65:1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFA
oklch(93.5% 0.024 262.1)
-
Step 200
200
#C9DAF8
oklch(88.5% 0.045 261.9)
-
Step 300
300
#A3C2F6
oklch(81% 0.081 260.6)
-
Step 400
400
#72A0F1
oklch(70.7% 0.129 261.1)
-
Step 500
500
#4C86EC
oklch(63.1% 0.165 260.8)
-
Step 600
600
#306DDB
oklch(55.7% 0.18 261.1)
-
Step 700
700
#235ABE
oklch(49.1% 0.168 261.2)
-
Step 800
800
#1E4A9A
oklch(42.7% 0.14 261.2)
-
Step 900
900 (this color)
#10306A
oklch(32.4% 0.108 261.1)
-
Step 950
950
#122548
oklch(27% 0.07 261.5)
#10306A 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) | #08376C | 0.020 |
| Deuteranopia (no green cones) | #002F69 | 0.012 |
| Tritanopia (no blue cones) | #003E48 | 0.083 |
| Achromatopsia (no color) | #333333 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10306A
#10306A
oklch(32.4% 0.108 261.1)
- #452F00
#452F00
oklch(32.3% 0.067 80.4)
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 #10306A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.021
- Marine Blue #01386A ΔE 0.024
- Prussian Blue #1D3557 ΔE 0.041
- Midnight Blue #191970 ΔE 0.056
- Twilight Blue #0A437A ΔE 0.059
- Dark Blue Grey #1F3B4D ΔE 0.070
- Midnight Green #073B4C ΔE 0.070
- Space Cadet #2B2D42 ΔE 0.076
Use #10306A 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.