#102F78
Closest named color: Marine Blue (#01386A). oklch(33.4% 0.13 263.5), rgb(16, 47, 120).
Aa
White text reads best on this color (12.35:1).
About this color
#102F78 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.130 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.037 away. White text reads best on it, at 12.35:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.69:1 |
| White text | 12.35:1 |
Values
| HEX | #102F78 |
| RGB | rgb(16, 47, 120) |
| HSL | hsl(222, 76%, 27%) |
| OKLCH | oklch(33.4% 0.13 263.5) |
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 #102F78 | 12.35:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #102F78 | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #102F78 text on white | 12.35:1 | AAA | Lc 97.6 | Preferred for body text |
| #102F78 text on black | 1.69:1 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C7DAFE
oklch(88.6% 0.054 263.2)
-
Step 300
300
#A1C1FF
oklch(81% 0.095 263.3)
-
Step 400
400
#6E9DFF
oklch(70.6% 0.153 263.6)
-
Step 500
500
#4881FF
oklch(63.2% 0.197 263.5)
-
Step 600
600
#2B65F0
oklch(55.6% 0.218 263.6)
-
Step 700
700
#1E53D1
oklch(49.1% 0.202 263.4)
-
Step 800
800
#1B45A9
oklch(42.8% 0.167 263.6)
-
Step 900
900 (this color)
#102F78
oklch(33.4% 0.13 263.5)
-
Step 950
950
#10244E
oklch(27.1% 0.082 263)
#102F78 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) | #00397A | 0.027 |
| Deuteranopia (no green cones) | #003077 | 0.010 |
| Tritanopia (no blue cones) | #00424E | 0.102 |
| Achromatopsia (no color) | #353535 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #102F78
#102F78
oklch(33.4% 0.13 263.5)
- #473300
#473300
oklch(33.5% 0.069 84.4)
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 #102F78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.037
- Marine #042E60 ΔE 0.044
- Midnight Blue #191970 ΔE 0.053
- Twilight Blue #0A437A ΔE 0.056
- Royal #0C1793 ΔE 0.064
- Prussian Blue #1D3557 ΔE 0.064
- Cobalt #1E488F ΔE 0.080
- Dark Blue #00008B ΔE 0.083
Use #102F78 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.