#303182
Closest named color: Dark Slate Blue (#483D8B). oklch(36.4% 0.133 277), rgb(48, 49, 130).
Aa
White text reads best on this color (11.12:1).
About this color
#303182 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.133 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.054 away. White text reads best on it, at 11.12:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.88:1 |
| White text | 11.12:1 |
Values
| HEX | #303182 |
| RGB | rgb(48, 49, 130) |
| HSL | hsl(239, 46%, 35%) |
| OKLCH | oklch(36.4% 0.133 277) |
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 #303182 | 11.12:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #303182 | 1.88:1 | Fails | Lc 8.6 | Not readable |
| #303182 text on white | 11.12:1 | AAA | Lc 95.3 | Preferred for body text |
| #303182 text on black | 1.88:1 | Fails | Lc -7.3 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E9FE
oklch(93.7% 0.029 275.2)
-
Step 200
200
#CFD7FE
oklch(88.6% 0.054 276.1)
-
Step 300
300
#B0BBFF
oklch(80.8% 0.097 276.9)
-
Step 400
400
#8995FF
oklch(70.7% 0.154 276.8)
-
Step 500
500
#6F76FF
oklch(63.2% 0.2 276.8)
-
Step 600
600
#5A58F0
oklch(55.5% 0.221 277)
-
Step 700
700
#4B47D1
oklch(49.1% 0.205 277)
-
Step 800
800
#3D3BA9
oklch(42.6% 0.171 277.1)
-
Step 900
900 (this color)
#303182
oklch(36.4% 0.133 277)
-
Step 950
950
#1D204E
oklch(27% 0.083 276.5)
#303182 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) | #003F85 | 0.049 |
| Deuteranopia (no green cones) | #003880 | 0.044 |
| Tritanopia (no blue cones) | #004554 | 0.114 |
| Achromatopsia (no color) | #3B3B3B | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #303182
#303182
oklch(36.4% 0.133 277)
- #4A3E00
#4A3E00
oklch(36.5% 0.075 96.7)
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 #303182, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.054
- Twilight Blue #0A437A ΔE 0.058
- Cobalt #1E488F ΔE 0.063
- Marine Blue #01386A ΔE 0.064
- Blueberry #464196 ΔE 0.065
- Sapphire #2138AB ΔE 0.071
- Midnight Blue #191970 ΔE 0.078
- Royal #0C1793 ΔE 0.078
Use #303182 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.