#30376B
Closest named color: Marine Blue (#01386A). oklch(35.9% 0.09 275.2), rgb(48, 55, 107).
Aa
White text reads best on this color (11.14:1).
About this color
#30376B is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.090 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.044 away. White text reads best on it, at 11.14:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.88:1 |
| White text | 11.14:1 |
Values
| HEX | #30376B |
| RGB | rgb(48, 55, 107) |
| HSL | hsl(233, 38%, 30%) |
| OKLCH | oklch(35.9% 0.09 275.2) |
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 #30376B | 11.14:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #30376B | 1.88:1 | Fails | Lc 8.3 | Not readable |
| #30376B text on white | 11.14:1 | AAA | Lc 95.6 | Preferred for body text |
| #30376B text on black | 1.88:1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
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
#8D9BE4
oklch(70.7% 0.108 275)
-
Step 500
500
#7280DC
oklch(63% 0.139 275.2)
-
Step 600
600
#5C68C9
oklch(55.6% 0.149 275.2)
-
Step 700
700
#4C56AE
oklch(49.1% 0.139 275.2)
-
Step 800
800
#3E478D
oklch(42.8% 0.115 274.9)
-
Step 900
900 (this color)
#30376B
oklch(35.9% 0.09 275.2)
-
Step 950
950
#1F2342
oklch(26.9% 0.058 276.3)
#30376B 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) | #203E6D | 0.026 |
| Deuteranopia (no green cones) | #1A396A | 0.027 |
| Tritanopia (no blue cones) | #16424B | 0.079 |
| Achromatopsia (no color) | #3B3B3B | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #30376B
#30376B
oklch(35.9% 0.09 275.2)
- #493C00
#493C00
oklch(35.9% 0.074 95.2)
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 #30376B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.045
- Twilight Blue #0A437A ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.060
- Marine #042E60 ΔE 0.061
- Dark Blue Grey #1F3B4D ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.069
- Charcoal #264653 ΔE 0.071
Use #30376B 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.