#03304D
Closest named color: Prussian Blue (#1D3557). oklch(29.7% 0.07 243.5), rgb(3, 48, 77).
Aa
White text reads best on this color (13.69:1).
About this color
#03304D is a dark, muted blue. In OKLCH its lightness is 30%, its chroma 0.070 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.034 away. White text reads best on it, at 13.69:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.53:1 |
| White text | 13.69:1 |
Values
| HEX | #03304D |
| RGB | rgb(3, 48, 77) |
| HSL | hsl(204, 93%, 16%) |
| OKLCH | oklch(29.7% 0.07 243.5) |
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 #03304D | 13.69:1 | AAA | Lc -103.0 | Preferred for body text |
| Black text on #03304D | 1.53:1 | Fails | Lc 0.0 | Not readable |
| #03304D text on white | 13.69:1 | AAA | Lc 99.9 | Preferred for body text |
| #03304D text on black | 1.53:1 | 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 950.
-
Step 50
50
#EFF6FC
oklch(97% 0.011 243.7)
-
Step 100
100
#DDECF9
oklch(93.6% 0.024 244.1)
-
Step 200
200
#C0DDF6
oklch(88.4% 0.046 244.3)
-
Step 300
300
#92C7F2
oklch(80.8% 0.082 243.5)
-
Step 400
400
#4CA9EC
oklch(70.8% 0.132 243.1)
-
Step 500
500
#0091DE
oklch(63.1% 0.153 243.2)
-
Step 600
600
#007ABC
oklch(55.7% 0.136 243.3)
-
Step 700
700
#00669F
oklch(49.1% 0.12 243.6)
-
Step 800
800
#005383
oklch(42.6% 0.105 243.8)
-
Step 900
900
#00456E
oklch(37.6% 0.092 243.7)
-
Step 950
950 (this color)
#03304D
oklch(29.7% 0.07 243.5)
#03304D 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) | #22314E | 0.030 |
| Deuteranopia (no green cones) | #182A4C | 0.024 |
| Tritanopia (no blue cones) | #00373A | 0.048 |
| Achromatopsia (no color) | #2D2D2D | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03304D
#03304D
oklch(29.7% 0.07 243.5)
- #442400
#442400
oklch(29.7% 0.068 63.1)
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 #03304D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.034
- Marine #042E60 ΔE 0.036
- Midnight Green #073B4C ΔE 0.039
- Oxford Blue #1B263B ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.046
- Gunmetal #293241 ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.048
- Marine Blue #01386A ΔE 0.054
Use #03304D 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.