#30366A
Closest named color: Prussian Blue (#1D3557). oklch(35.6% 0.09 275.9), rgb(48, 54, 106).
Aa
White text reads best on this color (11.28:1).
About this color
#30366A is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.090 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.044 away. White text reads best on it, at 11.28:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.86:1 |
| White text | 11.28:1 |
Values
| HEX | #30366A |
| RGB | rgb(48, 54, 106) |
| HSL | hsl(234, 38%, 30%) |
| OKLCH | oklch(35.6% 0.09 275.9) |
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 #30366A | 11.28:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #30366A | 1.86:1 | Fails | Lc 8.0 | Not readable |
| #30366A text on white | 11.28:1 | AAA | Lc 95.9 | Preferred for body text |
| #30366A text on black | 1.86:1 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D2D8F2
oklch(88.6% 0.036 275.3)
-
Step 300
300
#B4BEED
oklch(81% 0.067 275.4)
-
Step 400
400
#8E9BE3
oklch(70.8% 0.106 275.5)
-
Step 500
500
#7480DB
oklch(63.1% 0.137 276.1)
-
Step 600
600
#5D68C9
oklch(55.7% 0.149 275.6)
-
Step 700
700
#4D56AE
oklch(49.2% 0.139 275.7)
-
Step 800
800
#3F468D
oklch(42.6% 0.116 276.1)
-
Step 900
900 (this color)
#30366A
oklch(35.6% 0.09 275.9)
-
Step 950
950
#1F2342
oklch(26.9% 0.058 276.3)
#30366A 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) | #1F3D6C | 0.027 |
| Deuteranopia (no green cones) | #193869 | 0.029 |
| Tritanopia (no blue cones) | #17414B | 0.078 |
| Achromatopsia (no color) | #3B3B3B | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #30366A
#30366A
oklch(35.6% 0.09 275.9)
- #483B00
#483B00
oklch(35.6% 0.073 95)
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 #30366A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.044
- Marine Blue #01386A ΔE 0.044
- Twilight Blue #0A437A ΔE 0.051
- Marine #042E60 ΔE 0.059
- Dark Grey Blue #29465B ΔE 0.061
- Dark Blue Grey #1F3B4D ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.071
- Charcoal #264653 ΔE 0.072
Use #30366A 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.