#103E75
Closest named color: Twilight Blue (#0A437A). oklch(36.6% 0.106 255.6), rgb(16, 62, 117).
Aa
White text reads best on this color (10.67:1).
About this color
#103E75 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.106 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.016 away. White text reads best on it, at 10.67:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.96:1 |
| White text | 10.67:1 |
Values
| HEX | #103E75 |
| RGB | rgb(16, 62, 117) |
| HSL | hsl(213, 76%, 26%) |
| OKLCH | oklch(36.6% 0.106 255.6) |
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 #103E75 | 10.67:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #103E75 | 1.96:1 | Fails | Lc 9.6 | Not readable |
| #103E75 text on white | 10.67:1 | AAA | Lc 94.3 | Preferred for body text |
| #103E75 text on black | 1.96:1 | Fails | Lc -8.3 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF7
oklch(88.5% 0.045 255.6)
-
Step 300
300
#9FC3F4
oklch(80.8% 0.08 256.2)
-
Step 400
400
#69A3EF
oklch(70.8% 0.128 255.7)
-
Step 500
500
#3D89E9
oklch(63% 0.163 255.8)
-
Step 600
600
#1471D7
oklch(55.6% 0.176 255.5)
-
Step 700
700
#015EBB
oklch(49.2% 0.165 255.6)
-
Step 800
800
#0A4D97
oklch(42.7% 0.136 255.7)
-
Step 900
900 (this color)
#103E75
oklch(36.6% 0.106 255.6)
-
Step 950
950
#0D2646
oklch(26.8% 0.067 255.9)
#103E75 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) | #214377 | 0.022 |
| Deuteranopia (no green cones) | #093A74 | 0.013 |
| Tritanopia (no blue cones) | #004B53 | 0.081 |
| Achromatopsia (no color) | #3E3E3E | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #103E75
#103E75
oklch(36.6% 0.106 255.6)
- #563800
#563800
oklch(36.7% 0.077 75.5)
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 #103E75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.016
- Marine Blue #01386A ΔE 0.028
- Cobalt #1E488F ΔE 0.053
- Prussian Blue #1D3557 ΔE 0.055
- Light Navy #155084 ΔE 0.057
- Marine #042E60 ΔE 0.060
- Dark Grey Blue #29465B ΔE 0.061
- Deep Sea Blue #015482 ΔE 0.066
Use #103E75 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.