#10306E
Closest named color: Marine Blue (#01386A). oklch(32.7% 0.114 261.8), rgb(16, 48, 110).
Aa
White text reads best on this color (12.57:1).
About this color
#10306E is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.114 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.025 away. White text reads best on it, at 12.57:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.66:1 |
| White text | 12.57:1 |
Values
| HEX | #10306E |
| RGB | rgb(16, 48, 110) |
| HSL | hsl(220, 75%, 25%) |
| OKLCH | oklch(32.7% 0.114 261.8) |
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 #10306E | 12.57:1 | AAA | Lc -101.5 | Preferred for body text |
| Black text on #10306E | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #10306E text on white | 12.57:1 | AAA | Lc 98.1 | Preferred for body text |
| #10306E text on black | 1.66:1 | 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
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAF9
oklch(88.5% 0.047 261.4)
-
Step 300
300
#A2C1F9
oklch(80.8% 0.087 262)
-
Step 400
400
#709FF6
oklch(70.7% 0.138 261.9)
-
Step 500
500
#4B84F2
oklch(63.1% 0.176 262)
-
Step 600
600
#2E6BE1
oklch(55.7% 0.191 261.8)
-
Step 700
700
#2158C3
oklch(49% 0.177 261.9)
-
Step 800
800
#1D499E
oklch(42.8% 0.147 261.8)
-
Step 900
900 (this color)
#10306E
oklch(32.7% 0.114 261.8)
-
Step 950
950
#122549
oklch(27% 0.071 261.9)
#10306E 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) | #003870 | 0.023 |
| Deuteranopia (no green cones) | #002F6D | 0.012 |
| Tritanopia (no blue cones) | #003F4A | 0.087 |
| Achromatopsia (no color) | #333333 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10306E
#10306E
oklch(32.7% 0.114 261.8)
- #463000
#463000
oklch(32.6% 0.067 80.8)
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 #10306E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.025
- Marine #042E60 ΔE 0.027
- Prussian Blue #1D3557 ΔE 0.047
- Midnight Blue #191970 ΔE 0.055
- Twilight Blue #0A437A ΔE 0.057
- Dark Blue Grey #1F3B4D ΔE 0.075
- Midnight Green #073B4C ΔE 0.075
- Royal #0C1793 ΔE 0.079
Use #10306E 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.