#103D63
Closest named color: Marine Blue (#01386A). oklch(35.1% 0.082 248.4), rgb(16, 61, 99).
Aa
White text reads best on this color (11.23:1).
About this color
#103D63 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.082 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.024 away. White text reads best on it, at 11.23:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.86:1 |
| White text | 11.23:1 |
Values
| HEX | #103D63 |
| RGB | rgb(16, 61, 99) |
| HSL | hsl(207, 72%, 23%) |
| OKLCH | oklch(35.1% 0.082 248.4) |
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 #103D63 | 11.23:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #103D63 | 1.86:1 | Fails | Lc 8.3 | Not readable |
| #103D63 text on white | 11.23:1 | AAA | Lc 95.6 | Preferred for body text |
| #103D63 text on black | 1.86:1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCEF
oklch(88.5% 0.034 246.8)
-
Step 300
300
#A2C5E7
oklch(80.9% 0.061 247.8)
-
Step 400
400
#6EA6DB
oklch(70.7% 0.098 248)
-
Step 500
500
#448ED1
oklch(63% 0.125 248.4)
-
Step 600
600
#1F77BE
oklch(55.5% 0.136 248.3)
-
Step 700
700
#0F64A4
oklch(49.1% 0.126 248.2)
-
Step 800
800
#125285
oklch(42.7% 0.105 248.1)
-
Step 900
900 (this color)
#103D63
oklch(35.1% 0.082 248.4)
-
Step 950
950
#10283E
oklch(27% 0.051 248.4)
#103D63 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) | #2B3F65 | 0.029 |
| Deuteranopia (no green cones) | #1F3762 | 0.021 |
| Tritanopia (no blue cones) | #00464B | 0.059 |
| Achromatopsia (no color) | #3B3B3B | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #103D63
#103D63
oklch(35.1% 0.082 248.4)
- #543200
#543200
oklch(35.1% 0.077 69)
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 #103D63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.024
- Prussian Blue #1D3557 ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.039
- Twilight Blue #0A437A ΔE 0.041
- Midnight Green #073B4C ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.044
- Marine #042E60 ΔE 0.049
- Charcoal #264653 ΔE 0.051
Use #103D63 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.