#00305F
Closest named color: Marine (#042E60). oklch(31% 0.096 253.3), rgb(0, 48, 95).
Aa
White text reads best on this color (13.22:1).
About this color
#00305F is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.096 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.007 away. White text reads best on it, at 13.22:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.58:1 |
| White text | 13.22:1 |
Values
| HEX | #00305F |
| RGB | rgb(0, 48, 95) |
| HSL | hsl(210, 100%, 19%) |
| OKLCH | oklch(31% 0.096 253.3) |
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 #00305F | 13.22:1 | AAA | Lc -102.4 | Preferred for body text |
| Black text on #00305F | 1.58:1 | Fails | Lc 0.0 | Not readable |
| #00305F text on white | 13.22:1 | AAA | Lc 99.1 | Preferred for body text |
| #00305F text on black | 1.58:1 | 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
#EFF6FF
oklch(97% 0.014 254.6)
-
Step 100
100
#DCECFF
oklch(93.7% 0.031 252.7)
-
Step 200
200
#BFDCFF
oklch(88.5% 0.058 253.3)
-
Step 300
300
#93C4FF
oklch(80.8% 0.099 253.5)
-
Step 400
400
#52A3FF
oklch(70.7% 0.157 253.4)
-
Step 500
500
#0089FB
oklch(63.1% 0.196 253.2)
-
Step 600
600
#0073D4
oklch(55.6% 0.172 253.1)
-
Step 700
700
#0060B4
oklch(49.1% 0.153 253.4)
-
Step 800
800
#004F95
oklch(42.8% 0.133 253.1)
-
Step 900
900
#00417D
oklch(37.6% 0.117 253.3)
-
Step 950
950 (this color)
#00305F
oklch(31% 0.096 253.3)
#00305F 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) | #153461 | 0.021 |
| Deuteranopia (no green cones) | #002C5E | 0.012 |
| Tritanopia (no blue cones) | #003B42 | 0.071 |
| Achromatopsia (no color) | #303030 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00305F
#00305F
oklch(31% 0.096 253.3)
- #442A00
#442A00
oklch(31% 0.066 73.1)
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 #00305F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.007
- Marine Blue #01386A ΔE 0.030
- Prussian Blue #1D3557 ΔE 0.034
- Midnight Green #073B4C ΔE 0.055
- Dark Blue Grey #1F3B4D ΔE 0.060
- Space Cadet #2B2D42 ΔE 0.065
- Midnight Blue #191970 ΔE 0.066
- Gunmetal #293241 ΔE 0.067
Use #00305F 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.