#103F6C
Closest named color: Marine Blue (#01386A). oklch(36.2% 0.092 251.3), rgb(16, 63, 108).
Aa
White text reads best on this color (10.77:1).
About this color
#103F6C is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.092 and its hue 251°. 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 10.77:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.94:1 |
| White text | 10.77:1 |
Values
| HEX | #103F6C |
| RGB | rgb(16, 63, 108) |
| HSL | hsl(209, 74%, 24%) |
| OKLCH | oklch(36.2% 0.092 251.3) |
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 #103F6C | 10.77:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #103F6C | 1.94:1 | Fails | Lc 9.3 | Not readable |
| #103F6C text on white | 10.77:1 | AAA | Lc 94.6 | Preferred for body text |
| #103F6C text on black | 1.94:1 | Fails | Lc -8.0 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C7DCF2
oklch(88.6% 0.038 249.5)
-
Step 300
300
#A0C4EC
oklch(80.8% 0.069 251.4)
-
Step 400
400
#6BA5E3
oklch(70.7% 0.11 251.1)
-
Step 500
500
#3F8DDB
oklch(63.1% 0.141 251)
-
Step 600
600
#1675C9
oklch(55.6% 0.154 251.3)
-
Step 700
700
#0362AE
oklch(49.2% 0.143 251.3)
-
Step 800
800
#0C508D
oklch(42.7% 0.119 251.6)
-
Step 900
900 (this color)
#103F6C
oklch(36.2% 0.092 251.3)
-
Step 950
950
#0E2842
oklch(27.1% 0.058 250.8)
#103F6C 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) | #29426E | 0.027 |
| Deuteranopia (no green cones) | #1A3A6B | 0.015 |
| Tritanopia (no blue cones) | #004A50 | 0.068 |
| Achromatopsia (no color) | #3E3E3E | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #103F6C
#103F6C
oklch(36.2% 0.092 251.3)
- #573500
#573500
oklch(36.2% 0.078 70.4)
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 #103F6C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.025
- Twilight Blue #0A437A ΔE 0.025
- Prussian Blue #1D3557 ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.053
- Marine #042E60 ΔE 0.056
- Midnight Green #073B4C ΔE 0.057
- Charcoal #264653 ΔE 0.057
Use #103F6C 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.