#003471
Closest named color: Marine Blue (#01386A). oklch(33.5% 0.117 256.6), rgb(0, 52, 113).
Aa
White text reads best on this color (12.14:1).
About this color
#003471 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.117 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.018 away. White text reads best on it, at 12.14:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.72:1 |
| White text | 12.14:1 |
Values
| HEX | #003471 |
| RGB | rgb(0, 52, 113) |
| HSL | hsl(212, 100%, 22%) |
| OKLCH | oklch(33.5% 0.117 256.6) |
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 #003471 | 12.14:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #003471 | 1.72:1 | Fails | Lc 0.0 | Not readable |
| #003471 text on white | 12.14:1 | AAA | Lc 97.1 | Preferred for body text |
| #003471 text on black | 1.72:1 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C5DBFA
oklch(88.5% 0.049 256.9)
-
Step 300
300
#9CC3F9
oklch(80.9% 0.088 256.6)
-
Step 400
400
#64A2F7
oklch(70.8% 0.141 256.6)
-
Step 500
500
#3588F3
oklch(63.2% 0.179 256.5)
-
Step 600
600
#006EE1
oklch(55.5% 0.194 256.7)
-
Step 700
700
#005CBF
oklch(49% 0.172 256.8)
-
Step 800
800
#004B9E
oklch(42.6% 0.15 256.7)
-
Step 900
900 (this color)
#003471
oklch(33.5% 0.117 256.6)
-
Step 950
950
#0B264A
oklch(27.1% 0.074 256.8)
#003471 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) | #083B73 | 0.022 |
| Deuteranopia (no green cones) | #003170 | 0.009 |
| Tritanopia (no blue cones) | #00434D | 0.087 |
| Achromatopsia (no color) | #363636 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003471
#003471
oklch(33.5% 0.117 256.6)
- #4B3100
#4B3100
oklch(33.6% 0.07 76.6)
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 #003471, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.018
- Marine #042E60 ΔE 0.033
- Twilight Blue #0A437A ΔE 0.047
- Prussian Blue #1D3557 ΔE 0.050
- Midnight Blue #191970 ΔE 0.065
- Midnight Green #073B4C ΔE 0.073
- Dark Blue Grey #1F3B4D ΔE 0.074
- Cobalt #1E488F ΔE 0.080
Use #003471 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.