#03406E
Closest named color: Twilight Blue (#0A437A). oklch(36.3% 0.097 248.6), rgb(3, 64, 110).
Aa
White text reads best on this color (10.70:1).
About this color
#03406E is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.097 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.022 away. White text reads best on it, at 10.70:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.96:1 |
| White text | 10.70:1 |
Values
| HEX | #03406E |
| RGB | rgb(3, 64, 110) |
| HSL | hsl(206, 95%, 22%) |
| OKLCH | oklch(36.3% 0.097 248.6) |
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 #03406E | 10.70:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #03406E | 1.96:1 | Fails | Lc 9.6 | Not readable |
| #03406E text on white | 10.70:1 | AAA | Lc 94.3 | Preferred for body text |
| #03406E 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#DFEBF8
oklch(93.5% 0.022 250.2)
-
Step 200
200
#C5DCF3
oklch(88.5% 0.04 248.3)
-
Step 300
300
#9CC5EE
oklch(80.8% 0.073 248.7)
-
Step 400
400
#63A6E6
oklch(70.7% 0.117 248.8)
-
Step 500
500
#2F8EDE
oklch(63.1% 0.148 248.5)
-
Step 600
600
#0077C7
oklch(55.7% 0.152 248.5)
-
Step 700
700
#0064A8
oklch(49.2% 0.133 248.3)
-
Step 800
800
#00518B
oklch(42.6% 0.117 248.8)
-
Step 900
900 (this color)
#03406E
oklch(36.3% 0.097 248.6)
-
Step 950
950
#092843
oklch(27% 0.062 248.7)
#03406E 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) | #294370 | 0.032 |
| Deuteranopia (no green cones) | #183A6D | 0.020 |
| Tritanopia (no blue cones) | #004B51 | 0.069 |
| Achromatopsia (no color) | #3E3E3E | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03406E
#03406E
oklch(36.3% 0.097 248.6)
- #593500
#593500
oklch(36.5% 0.08 68.6)
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 #03406E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.022
- Marine Blue #01386A ΔE 0.025
- Prussian Blue #1D3557 ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.057
- Marine #042E60 ΔE 0.058
- Midnight Green #073B4C ΔE 0.059
- Light Navy #155084 ΔE 0.060
Use #03406E 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.