#103C7F
Closest named color: Twilight Blue (#0A437A). oklch(36.9% 0.123 259.2), rgb(16, 60, 127).
Aa
White text reads best on this color (10.63:1).
About this color
#103C7F is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.123 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.023 away. White text reads best on it, at 10.63:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.97:1 |
| White text | 10.63:1 |
Values
| HEX | #103C7F |
| RGB | rgb(16, 60, 127) |
| HSL | hsl(216, 78%, 28%) |
| OKLCH | oklch(36.9% 0.123 259.2) |
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 #103C7F | 10.63:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #103C7F | 1.97:1 | Fails | Lc 9.8 | Not readable |
| #103C7F text on white | 10.63:1 | AAA | Lc 94.2 | Preferred for body text |
| #103C7F text on black | 1.97:1 | Fails | Lc -8.4 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C5DBFC
oklch(88.6% 0.051 258.4)
-
Step 300
300
#9DC2FD
oklch(80.9% 0.093 259.6)
-
Step 400
400
#66A0FC
oklch(70.7% 0.149 259.3)
-
Step 500
500
#3A85F9
oklch(63.1% 0.189 259.1)
-
Step 600
600
#136BE8
oklch(55.6% 0.205 259.2)
-
Step 700
700
#0258CA
oklch(49.1% 0.191 259.3)
-
Step 800
800
#0949A3
oklch(42.7% 0.158 259.1)
-
Step 900
900 (this color)
#103C7F
oklch(36.9% 0.123 259.2)
-
Step 950
950
#0C254C
oklch(27% 0.079 259.2)
#103C7F 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) | #0F4481 | 0.023 |
| Deuteranopia (no green cones) | #003A7E | 0.011 |
| Tritanopia (no blue cones) | #004C57 | 0.094 |
| Achromatopsia (no color) | #3E3E3E | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #103C7F
#103C7F
oklch(36.9% 0.123 259.2)
- #553A00
#553A00
oklch(37% 0.077 79.3)
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 #103C7F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.023
- Marine Blue #01386A ΔE 0.039
- Cobalt #1E488F ΔE 0.045
- Light Navy #155084 ΔE 0.059
- Marine #042E60 ΔE 0.067
- Prussian Blue #1D3557 ΔE 0.069
- Deep Sea Blue #015482 ΔE 0.070
- Dark Slate Blue #483D8B ΔE 0.073
Use #103C7F 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.