#10285B
Closest named color: Marine (#042E60). oklch(29.2% 0.097 262.9), rgb(16, 40, 91).
Aa
White text reads best on this color (14.22:1).
About this color
#10285B is a dark, moderately saturated blue. In OKLCH its lightness is 29%, its chroma 0.097 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 14.22:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.47:1 |
| White text | 14.22:1 |
Values
| HEX | #10285B |
| RGB | rgb(16, 40, 91) |
| HSL | hsl(221, 70%, 21%) |
| OKLCH | oklch(29.2% 0.097 262.9) |
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 #10285B | 14.22:1 | AAA | Lc -103.6 | Preferred for body text |
| Black text on #10285B | 1.47:1 | Fails | Lc 0.0 | Not readable |
| #10285B text on white | 14.22:1 | AAA | Lc 100.6 | Preferred for body text |
| #10285B text on black | 1.47:1 | 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
#4581FF
oklch(63.1% 0.198 262.9)
-
Step 600
600
#1960FF
oklch(55.5% 0.245 262.9)
-
Step 700
700
#064CE3
oklch(49.1% 0.236 262.9)
-
Step 800
800
#0A40B7
oklch(42.7% 0.195 262.9)
-
Step 900
900
#103891
oklch(37.6% 0.154 262.9)
-
Step 950
950 (this color)
#10285B
oklch(29.2% 0.097 262.9)
#10285B 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) | #062E5D | 0.018 |
| Deuteranopia (no green cones) | #00275A | 0.014 |
| Tritanopia (no blue cones) | #00343D | 0.075 |
| Achromatopsia (no color) | #2B2B2B | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10285B
#10285B
oklch(29.2% 0.097 262.9)
- #3A2800
#3A2800
oklch(29.1% 0.06 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 #10285B, 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
- Marine Blue #01386A ΔE 0.051
- Midnight Blue #191970 ΔE 0.051
- Oxford Blue #1B263B ΔE 0.059
- Space Cadet #2B2D42 ΔE 0.063
- Gunmetal #293241 ΔE 0.071
- Midnight Green #073B4C ΔE 0.072
Use #10285B 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.