#03376D
Closest named color: Marine Blue (#01386A). oklch(34% 0.107 254.5), rgb(3, 55, 109).
Aa
White text reads best on this color (11.85:1).
About this color
#03376D is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.107 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.006 away. White text reads best on it, at 11.85:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.77:1 |
| White text | 11.85:1 |
Values
| HEX | #03376D |
| RGB | rgb(3, 55, 109) |
| HSL | hsl(211, 95%, 22%) |
| OKLCH | oklch(34% 0.107 254.5) |
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 #03376D | 11.85:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #03376D | 1.77:1 | Fails | Lc 0.0 | Not readable |
| #03376D text on white | 11.85:1 | AAA | Lc 96.6 | Preferred for body text |
| #03376D text on black | 1.77:1 | 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
#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
#9EC4F4
oklch(81% 0.08 254.5)
-
Step 400
400
#66A3EF
oklch(70.6% 0.129 254.7)
-
Step 500
500
#388AE9
oklch(63.1% 0.163 254.4)
-
Step 600
600
#0671D7
oklch(55.5% 0.178 254.6)
-
Step 700
700
#005FB8
oklch(49.1% 0.16 254.6)
-
Step 800
800
#024E97
oklch(42.8% 0.136 254.3)
-
Step 900
900 (this color)
#03376D
oklch(34% 0.107 254.5)
-
Step 950
950
#0C2746
oklch(27.1% 0.066 254)
#03376D 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) | #183C6F | 0.023 |
| Deuteranopia (no green cones) | #00336C | 0.013 |
| Tritanopia (no blue cones) | #00444C | 0.080 |
| Achromatopsia (no color) | #373737 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03376D
#03376D
oklch(34% 0.107 254.5)
- #4D3100
#4D3100
oklch(33.9% 0.072 74.4)
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 #03376D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.006
- Marine #042E60 ΔE 0.034
- Prussian Blue #1D3557 ΔE 0.041
- Twilight Blue #0A437A ΔE 0.041
- Midnight Green #073B4C ΔE 0.063
- Dark Blue Grey #1F3B4D ΔE 0.063
- Dark Grey Blue #29465B ΔE 0.072
- Midnight Blue #191970 ΔE 0.075
Use #03376D 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.