#10284F
Closest named color: Marine (#042E60). oklch(28.2% 0.078 259.7), rgb(16, 40, 79).
Aa
White text reads best on this color (14.59:1).
About this color
#10284F is a dark, moderately saturated blue. In OKLCH its lightness is 28%, its chroma 0.078 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.033 away. White text reads best on it, at 14.59:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.43:1 |
| White text | 14.59:1 |
Values
| HEX | #10284F |
| RGB | rgb(16, 40, 79) |
| HSL | hsl(217, 66%, 19%) |
| OKLCH | oklch(28.2% 0.078 259.7) |
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 #10284F | 14.59:1 | AAA | Lc -104.1 | Preferred for body text |
| Black text on #10284F | 1.43:1 | Fails | Lc 0.0 | Not readable |
| #10284F text on white | 14.59:1 | AAA | Lc 101.2 | Preferred for body text |
| #10284F text on black | 1.43:1 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DAFC
oklch(88.4% 0.052 261.1)
-
Step 300
300
#9EC2FC
oklch(80.9% 0.091 259.8)
-
Step 400
400
#67A0FB
oklch(70.7% 0.147 259.4)
-
Step 500
500
#3D85F9
oklch(63.2% 0.188 259.6)
-
Step 600
600
#186BE8
oklch(55.7% 0.204 259.6)
-
Step 700
700
#0858CA
oklch(49.1% 0.191 259.7)
-
Step 800
800
#0D49A3
oklch(42.8% 0.157 259.6)
-
Step 900
900
#143E81
oklch(37.7% 0.122 259.7)
-
Step 950
950 (this color)
#10284F
oklch(28.2% 0.078 259.7)
#10284F 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) | #142C50 | 0.014 |
| Deuteranopia (no green cones) | #08264E | 0.011 |
| Tritanopia (no blue cones) | #003137 | 0.061 |
| Achromatopsia (no color) | #292929 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10284F
#10284F
oklch(28.2% 0.078 259.7)
- #382500
#382500
oklch(28.1% 0.058 79.5)
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 #10284F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.033
- Oxford Blue #1B263B ΔE 0.038
- Prussian Blue #1D3557 ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.050
- Dark #1B2431 ΔE 0.055
- Gunmetal #293241 ΔE 0.059
- Marine Blue #01386A ΔE 0.063
- Midnight Green #073B4C ΔE 0.064
Use #10284F 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.