#003474
Closest named color: Marine Blue (#01386A). oklch(33.8% 0.121 257.3), rgb(0, 52, 116).
Aa
White text reads best on this color (12.04:1).
About this color
#003474 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.121 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.022 away. White text reads best on it, at 12.04:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.74:1 |
| White text | 12.04:1 |
Values
| HEX | #003474 |
| RGB | rgb(0, 52, 116) |
| HSL | hsl(213, 100%, 23%) |
| OKLCH | oklch(33.8% 0.121 257.3) |
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 #003474 | 12.04:1 | AAA | Lc -100.5 | Preferred for body text |
| Black text on #003474 | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #003474 text on white | 12.04:1 | AAA | Lc 96.9 | Preferred for body text |
| #003474 text on black | 1.74:1 | 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
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C5DBFB
oklch(88.5% 0.05 257.7)
-
Step 300
300
#9BC3FB
oklch(80.9% 0.091 256.9)
-
Step 400
400
#63A1FA
oklch(70.7% 0.146 257.5)
-
Step 500
500
#3387F7
oklch(63.2% 0.186 257.1)
-
Step 600
600
#006DE5
oklch(55.6% 0.201 257.4)
-
Step 700
700
#005BC2
oklch(49% 0.177 257.5)
-
Step 800
800
#004BA0
oklch(42.8% 0.152 257.1)
-
Step 900
900 (this color)
#003474
oklch(33.8% 0.121 257.3)
-
Step 950
950
#0A264B
oklch(27.1% 0.076 256.8)
#003474 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) | #013B76 | 0.021 |
| Deuteranopia (no green cones) | #003273 | 0.006 |
| Tritanopia (no blue cones) | #00444E | 0.092 |
| Achromatopsia (no color) | #363636 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #003474
#003474
oklch(33.8% 0.121 257.3)
- #4B3200
#4B3200
oklch(33.8% 0.07 78.2)
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 #003474, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.022
- Marine #042E60 ΔE 0.038
- Twilight Blue #0A437A ΔE 0.046
- Prussian Blue #1D3557 ΔE 0.054
- Midnight Blue #191970 ΔE 0.065
- Royal #0C1793 ΔE 0.076
- Cobalt #1E488F ΔE 0.077
- Midnight Green #073B4C ΔE 0.078
Use #003474 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.