#10285C
Closest named color: Marine (#042E60). oklch(29.3% 0.098 263.1), rgb(16, 40, 92).
Aa
White text reads best on this color (14.18:1).
About this color
#10285C is a dark, moderately saturated blue. In OKLCH its lightness is 29%, its chroma 0.098 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.019 away. White text reads best on it, at 14.18:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.48:1 |
| White text | 14.18:1 |
Values
| HEX | #10285C |
| RGB | rgb(16, 40, 92) |
| HSL | hsl(221, 70%, 21%) |
| OKLCH | oklch(29.3% 0.098 263.1) |
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 #10285C | 14.18:1 | AAA | Lc -103.6 | Preferred for body text |
| Black text on #10285C | 1.48:1 | Fails | Lc 0.0 | Not readable |
| #10285C text on white | 14.18:1 | AAA | Lc 100.6 | Preferred for body text |
| #10285C text on black | 1.48:1 | 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 950.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#DFEAFF
oklch(93.5% 0.031 263.5)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300
#A0C1FF
oklch(80.9% 0.095 262.7)
-
Step 400
400
#6D9EFF
oklch(70.8% 0.152 262.8)
-
Step 500
500
#4681FF
oklch(63.1% 0.198 263.1)
-
Step 600
600
#1B60FF
oklch(55.6% 0.245 263.1)
-
Step 700
700
#064BE5
oklch(49.1% 0.239 263)
-
Step 800
800
#093FB9
oklch(42.7% 0.199 263)
-
Step 900
900
#103892
oklch(37.7% 0.155 263)
-
Step 950
950 (this color)
#10285C
oklch(29.3% 0.098 263.1)
#10285C 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) | #042F5E | 0.021 |
| Deuteranopia (no green cones) | #00285B | 0.013 |
| Tritanopia (no blue cones) | #00353D | 0.078 |
| Achromatopsia (no color) | #2B2B2B | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10285C
#10285C
oklch(29.3% 0.098 263.1)
- #3A2900
#3A2900
oklch(29.3% 0.06 84.3)
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 #10285C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.019
- Prussian Blue #1D3557 ΔE 0.047
- Midnight Blue #191970 ΔE 0.050
- Marine Blue #01386A ΔE 0.050
- Oxford Blue #1B263B ΔE 0.061
- Space Cadet #2B2D42 ΔE 0.064
- Gunmetal #293241 ΔE 0.072
- Midnight Green #073B4C ΔE 0.072
Use #10285C 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.