#00304E
Closest named color: Marine (#042E60). oklch(29.7% 0.072 243.2), rgb(0, 48, 78).
Aa
White text reads best on this color (13.70:1).
About this color
#00304E is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.072 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.035 away. White text reads best on it, at 13.70:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.53:1 |
| White text | 13.70:1 |
Values
| HEX | #00304E |
| RGB | rgb(0, 48, 78) |
| HSL | hsl(203, 100%, 15%) |
| OKLCH | oklch(29.7% 0.072 243.2) |
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 #00304E | 13.70:1 | AAA | Lc -103.0 | Preferred for body text |
| Black text on #00304E | 1.53:1 | Fails | Lc 0.0 | Not readable |
| #00304E text on white | 13.70:1 | AAA | Lc 99.9 | Preferred for body text |
| #00304E 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
#EFF7FD
oklch(97.2% 0.012 239.9)
-
Step 100
100
#DCECFA
oklch(93.5% 0.026 244.4)
-
Step 200
200
#BFDEF7
oklch(88.6% 0.048 242.5)
-
Step 300
300
#90C8F4
oklch(81% 0.085 242.7)
-
Step 400
400
#47A9EF
oklch(70.8% 0.137 243.3)
-
Step 500
500
#0091DE
oklch(63.1% 0.153 243.2)
-
Step 600
600
#007ABB
oklch(55.7% 0.134 242.9)
-
Step 700
700
#00669E
oklch(49% 0.119 243.2)
-
Step 800
800
#005483
oklch(42.8% 0.104 243)
-
Step 900
900
#00456E
oklch(37.6% 0.092 243.7)
-
Step 950
950 (this color)
#00304E
oklch(29.7% 0.072 243.2)
#00304E 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) | #21314F | 0.031 |
| Deuteranopia (no green cones) | #162A4D | 0.023 |
| Tritanopia (no blue cones) | #00373B | 0.048 |
| Achromatopsia (no color) | #2D2D2D | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00304E
#00304E
oklch(29.7% 0.072 243.2)
- #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 #00304E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.035
- Prussian Blue #1D3557 ΔE 0.035
- Midnight Green #073B4C ΔE 0.040
- Oxford Blue #1B263B ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.048
- Gunmetal #293241 ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.049
- Marine Blue #01386A ΔE 0.053
Use #00304E 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.